I'm a huge fan of hip hop because I personally see it as the most technical form of music there is. Of course, I'm not referring to the 21 Savage, Lil' Pump, 6ix 9ine and Migos types of artists. I'm referring to the MCs of Hip hop: NWA, Eminem, J.Cole, NAS, etc... 

Some of the most recent bars that I love is: Eminem ft. Royce Da 5'9, Not Alike: "You ain't even charged in connection to battery bitch, you ain't plugged into nothing" because using the double entendre using 4 words is actually really tough. When I first heard it, it felt like I was slapped in the face. 

Another one is: Lil' Wayne, Mona Lisa: "If Liz calls you daddy, she about to be a bastard" in part because of the storytelling of the song that led to this punch line and because it's an extremely hard hitting bar.
 

What are your favorite bars in hip hop, why and in which song does it come from?

I never liked Drake until I heard him and Cole on a track together called "Jodeci". I listened for J. Cole obviously but Drake did his thing. No clue if Drake wrote it but it's his bar:

"All this capital it's like I left the caps lock on
It's like every time I plot a return I seem to shift the game
See I can still talk keys without pitchin' cane"

I thought it was a creative way to say "I don't sell drugs"

People wouldnt realize it, but I can get on some Twista...

Real rap right here man. The beat is lit and twista goes ham dawg. ham. Gotta listen to at least 1:40 to hear the magic..but the intro to the song is one of my favorites 

.

https://www.youtube.com/watch?v=PmLUdiALKj0

Try nigga, imma ride nigga, you still alive nigga
Gon' die nigga, gon' drop, cause ain't no room at the top
Walk in the room like I'm 'Pac, bringing you doom when I rock
Its suicide nigga, blood stains nigga, nuts hang nigga
Bust them motherfuckers from my black, mustang nigga
Yes I shot them with the pound, got them with the rounds
Hollow point to lay his motherfucking body on the ground
Now you breathing and shacking cold, hoping that god don't take your soul
With two bitch straps and a vest is just the only way to roll
Now if you don't wanna die, then I suggest you better try
Breathe hard, hold on to your life, fight nigga

In Detroit vs. Everybody, I really love this Royce da 5'9's line: He shall see shells, but not by the seashore. Playing off the tongue twister: "She sells sea shells by the seashore", Royce turns this phrase around saying that a person will see gun shells in Detroit.

There are many amazing bars out there.

“Distortion To Static”  by The Roots

“Now, go get your dictionary and your Pictionary / Cause much affliction with my diction friction slips and carries / Words and herds like some cattle in the steeple / People, there’s no equal, or no sequel / So policies, of equalities, get abolished / Demolished, distortion of the static’s getting polished / Urges of splurge and words will just be merged / Together, damn it’s quite clever, however…” 

Moment of Truth by Gang Starr

I smoke a blunt to take the pain out, and if i wasn't High I'd probably try to blow my brains out. 

I'm Hopeless

They should have killed me as a baby now they got me locked in the storm i'm going crazy, 

forgive me. 

they wanna see me in my casket and if i don't blast i'll be a victim of dem bastads. 

-Pac

Boogie ft. Eminem, Rainy Days: "Dre said, 'Rock the boat" and the Doc is my peer" 

I really love this because of the witty lyricism. --> Doc as in Doctor. Dre and dock as in a place to dock your boat. Peer as in an equal and pier as in a landing stage for boats. 

Great little double entendre there. 

"He who has ears, let'em hear

and he who has sight, let'em see.

He who has life, let'em be.

See everything goes through change.

Those who know, don't talk

and those talk don't know a thing.

-

Men are born soft and turned tough.

Dead lay a stiffened heart. I've been kissed by God."

                                                            ~~NAS

Freedom of Speech, let 'em take it from me
Next they'll take it from you, then what you gonna do?
Let 'em censor books, let 'em censor art
PMRC, this is where the witch hunt starts
You'll censor what we see, we read, we hear, we learn
The books will burn
You better think it out
We should be able to say anything, our lungs were meant to shout
Say what we feel, yell out what's real
Even though it may not bring mass appeal
Your opinion is yours, my opinion is mine
If you don't like what I'm sayin'? Fine
But don't close it, always keep an open mind
A man who fails to listen is blind
We only got one right left in the world today
Let me have it or throw The Constitution away

Freedom of Speech Ice-T

"and he kept asking me, What kind of car you drive?

I know yall paid. I know yall got bookoo bookfolds from all them songs that yall done made.

I replied, that I've been going through the same thing that he has.

True I got more fans than the average man;

but not enough loot to last me....

to the end of the week.

I live by the beat, like you live check to check.

If you dont move your feet then I dont eat,

so we like neck and neck."

-Andre3stacks

skrrrt brr bop bop blrttt 

I actually kind of find it funny when rappers make all the weird noises and make millions of dollars for doing it. Skrrtt blip blip 

I came, I saw, I conquered.

With no big name, no fame, no celebrity sponsors.

Just some game and a flow that was bonkers.

You can front if you want,

I murder people like them women from Monster.  - T.I.P

I wish I knew who all these guys were lol!

Never had a name so I made one for myself
Young fire, old flame, never came up by myself, spittin'-
-bars to my bredrin it's like jail up on myself
If I had to sky one, I prison break from it myself
Cos I just saw myself on TV
Funny how you can't tell a vision till it's been screened
Money's now the reason I invest, cos I need p's
Build your own brand, you ain't gonna see Jordan in Yeezy's
The Life of Pablo, this college drop-out graduated now I'm Picasso
It's Magna Carta Holy Grail whenever I rap flows
That's what the preacher said and what my teacher said
Thinking caps on, I had my hat low
Wondering how much does it cost to be rich
They say impossible's nothing when you come from nothing, it possibly is

- Avelino dailly duppy it's not hip hop it's grime but basically the same thing, right?