Back it 

To provide additional support for someone in a fight

"If I get into a fight, will you back it cuz?"

Back it by WannaThrowDown? May 30, 2017

back it 

v. to smoke marijuana.

n. back - marijuana

"wanna back it?"

"man i'm so fuckin backed right now....we just smoked like 4 bowls."

back it by Michael p. jones February 26, 2006

back it out 

what roadman say when they are pulling out the blades

PULL OUT THE SHANK BLUD
BACK IT OUT MEANS PULL OUT IN SLANG
SHANK MEANS KINFR BTW

back it out by radddddh77 January 28, 2020

Back it up 

“i can do this all day~ back it up back it up”
Make a wish - NCT U

“Back it up bbygirl😩🥵💨❤️“
“pushing my ass or the kpop music?”
“what”
“what”

Back it up by FuckSM October 29, 2020

back it up like a Tonka truck 

To back it up and get down.

An ancient saying, originating in Mesopotamia, recently reintroduced by rapper Pitbull in the song 'On the Floor' by the Jennifer Lopez.

Moments after entering the club, Matthew backed it up like a Tonka truck.

Joseph ordered a root beer at the bar, then proceeded to back it up like a Tonka truck.

back it up like a Tonka truck by grandmaster_phag June 28, 2016

Back it up and dump it 

When dancing at the club: This is when a woman faces away from you, bends over, and uses you like a stripper pole. This usually includes booty to package contact, with rhythmic grinding, followed with a quick squat performed by the woman to where dat ass either hits the dance floor, or your shoe.

When having sexuals: This is when, while in the doggy style position or one of its variants, the woman either pushes back upon the male member and then grinds on the cock while it is fully inside of her, or when the woman gyrates her hips vertically while stroking back and forth on the cock.

lil Wayne in the song, 'Every Girl': "...I just wanna get behind it, and watch you back it up and dump it..."

--------------------

Bob: What did you do this weekend?

John: Well, Friday, yo mama called me when you went to sleep, and I came over and let her back it up and dump it.

Bob: Shut up!

John: Move out of yo mama's basement!

Back it up and dump it by t_doffing July 27, 2009

Back it up, BEEP! BEEP! BEEP! 

To ask someone to repeat something which needs clarification.

Jerry: She said there's some tractor story that she hasn't told me about.

George: Woah, back it up, back it up, Beep! Beep! Beep! Tractor story?

Jerry: Beep, beep, beep? What are you doing?

Back it up, BEEP! BEEP! BEEP! by Dick Armey October 20, 2006