back-vag

When a persons ass crack is showing above the waist of their pants creating a vagina like crack on their backside.
Mike "Dude, that girl in front of us in economics totally had a back-vag going on."
Al "I know man. It was so hot."
Mike "Dude! She was 300 pounds at least!"
Al "I know."
by Adam Woodard February 20, 2007
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back luck

The best possible luck ever, if you get back luck you are the luckiest person alive.
Send APUSH hw or have back luck for 12 days:
by anon3456281389 March 17, 2017
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skunt back

To drive very fast. To go so fast that your skin is pulled backward. Skunt is a southern way of saying "skinned". So, one is going so fast he is being skinned back.
Bubba was skunt back in his pickup truck when the cop pulled him over.
by BigDewBoy May 02, 2006
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back in the day

Completely meaningless phrase which has gained mysterious global popularity. It means "Once, I..." or "I used to..." but is uglier and lazier. Similar to the equally meaningless "at the end of the day..." popularised by English soccer stars.
Back in the day, I used to be younger.

I was a child once, back in the day.

by hunthill August 16, 2006
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back splash

the act of ejaculating on a woman's back
after i did her from behind i pulled it out and gave her a back splash
by JAB/EJB July 06, 2006
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talk back

Person 1 :you're a wasteman. Person 2 yeah talk back fam! I wil rush you
by damandemgetme July 21, 2011
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back killer

an asian girl that looks beautiful from behind, but when she turns around and you see her face she's ugly as hell!
man, i just got killed by another back killer today!
by jamesymobilio August 22, 2005
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