Black Back

When someone places their bare ass on someone’s back and takes a shit.
Blow: “hey Blurnt want a black back?”
Blurnt: “what? No do not shit on my back
by Fronklas February 02, 2023
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Reverse Back To The Future

A sex move when the a male is fucking their partner doggy style, during the act the male or top must be clenching whiskey in their ass. When they are about to come they must release the whiskey at high speeds while holding a lighter to their rectum, this will spray a line of fire behind the performer.

This is in reference to the scene where Doc Brown tries to fuel the DeLorean with whiskey as well as the fire trail the DeLorean leaves behind when traveling through time.
I just did a Reverse Back To The Future on my girl, my house may have burned down but the rush was great!
by AmishCurse October 28, 2018
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Back-Pipe

Within the confines of a long distance relationship, you cannot have any sexual intercourse (AKA “laying pipe”). Thus much like back taxes, you must pay a lot more pipe than you usually would upon seeing your significant other to make up for the back-pipe.
Man I just saw my girlfriend after 2 months being apart. We didn’t even sleep our first night together, had to make up for the back-pipe. *wink* *wink*
by Aaayyyy June 06, 2024
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paint your back like Piccaso

The act of back shots and then rubbing the cum around on their back
I’m going to paint your back like Piccaso tonight
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I'LL PAY YOU BACK

The act of saying but not doing when it comes to paying your homies back.

Usually given enough of a time gap that the homie might forget.
Nicoli: I'LL PAY YOU BACK next week I get my "paycheck"
by WACKYJK33 December 29, 2023
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