Crack has many definitions. The first definition is a crack in a wall or floor.

The second definition is a buttcrack. Either a man's buttcrack or a woman's buttcrack.

The third definition is that Crack is a dangerous drug. It's more dangerous than Crystal Speed and Blue Speed despite being weaker than Blue Speed and Crystal Speed because Crack not only affects your brain, but also your heart (due to Crack being cardiotoxic while Speed is not). Crack is wack. Crack last around 30 to 90 minutes while it makes you high but act crazy. Speed makes you high but study and clean and shower more. Crack is freebase cocaine. It is made with cocaine hydrochloride and sodium bicarbonate. Crack ruins lives and it's more expensive than Speed while also being crappier. Crack gets its name from the crackling sound it makes while burned. Crack (benzoylmethylecgonine) can lead to a heart attack and extreme poverty because you're wasting all your money on crack!! Crack is wack!
Steve: You got any Crack?
Drug dealer: $60.

Steve: *Smokes Crack.

*runs around naked.

People: Ahhh!

Steve: Crack is awesome!

People: What a Crackhead!

Police: You're under arrest for public nudity!

*tests for drug using pee test.

*Steve test positive for Crack! .
Steve (in jail): Aw man! Stupid Crack! I guess Crack IS wack!
by CognitiveFuel December 17, 2022
1. The solid form of the illicit, recreational drug, cocaine.
2. A small gap on the surface of an object.
3. An illegally obtained password or file to a copyrighted computer program.

1. The quality or state of excellence. (often used to describe music)
2. Having a small gap on the surface of an object. -ed

1. To make a small gap on the surface of an object.
2. To illegally pass through some form of passive security (often used with computer programs, see NOUN-3).
3. To punch someone in an altercation.
4. To start. -ing
5. To be occurring. (often used in the greeting, "What's crackin'?!")
1. Yo son i need to smoke some crack ASAP.
2. Theres a crack on the sidewalk over here.
3. I need a crack for that new computer game.

1. That new Young Jeezy song is straight crack.
2. This glass is cracked.

1. You have to crack the egg before you can put it in the mixing bowl.
2. The bank robbers cracked the code to the bank's safe.
3. If he says one more thing about my mother ima crack him in his jaw.
4. Let's get this show crackin'.
5. Ayo, my man, whats crackin?!
by Matthew1218 March 28, 2008
(Adj.): Synonym for the slang use of "crazy"; wild, entertaining; of a nature that is indescribably cutting-edge
"That Cirque du Soleil show was absolutely crack!"

"Yah. It was pretty crazy. Now Miles Davis's "Bitches Brew"--this jazz is crack, all over the place.
by Nietzschehope July 11, 2008
crack cocain, a white drug substance that fucks you up.
crack... drywall dust... what's the difference?
by Vw4Life September 11, 2008
I cracked on the shawty Melissa earlier
I'm trying to crack on that one girl right there
by DaWvyBoy November 7, 2019
Basically, crack is silly, intentionally non-serious, and has a high tendency to be extremely crazy and unfounded, such as purposeful OOC-ness or playing on cliches, inside jokes, and/or fanon.

The term crack probably stems from crack as in crack cocaine, as opposed to a crack in a wall. As in, so horrendously unfounded/silly that only one could have come up with it while under the influence of crack.
Ed/Roze and Kagome/Kohaku are my secret crack pairings in the Fullmetal Alchemist and Inuyasha fandom.

Kagome/Sake, Inuyasha/Tessaiga, Inuyasha/Kagome's Seiraa Fuku, Shinidamachuu/Kikyou, Naraku/Kikyou's Ashes, and Jakotsu/Hairpin are also crack pairings - these are all from Inuyasha as well.
by Numisma August 13, 2005
Something you should never step on when you're walking on a sidewalk or else you'll break your mother's back.
7 yr old: "I dare you to step on that crack!"
Other 7 yr old: "Nah, I don't wanna break my mom's back."
by soowutthegreat January 23, 2021