Back-9

The second half and presumingly less attractive years in a woman's life.

Maddison was a hottie in 2001 but now she's on the back-9

by Fraz Von Hoffer May 18, 2016

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

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 September 13, 2008

Back to Back

to sit back to back with another male and jerk off, usually backs are not touching, but if they are its a TBTB touching back to back.

tom: hey rod wanna toss a batch back to back ?
rod: yeah like the last time where you painted my back?
tom: no dude i promise this time, we'll make it a TBTB so there will be no surprises.

by sweet_lou October 13, 2007

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 6, 2006

back-door-gasm

A back-door-gasm is the cumgasm a guy has when he seeds another dude in his asshole.

Matt has at least two back-door-gasms in me tous les jours!

by eda-skip November 1, 2021

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 September 8, 2005