back tits

gargantuan amount of excess blubber on the back, giving the appearance that the person has a pair of jugs growing from the back. admired by some, despised by many.

i was dancing in the club and i caught a glimpse of back tits across the room and almost threw up.

by ssinnerstepss87 August 19, 2007

Back Out Rule

An unspoken rule that dictates when two motorists are parked next to each other and inter their car at approximately the same time, the one that starts his/her car first gets to back out first.
Should the cars start at the same exact time, eye contact should be made to decide who is to back out of his/her spot first.

Adam got in a wreck with a lady who didn't abide by the back out rule. He started his car first, but she backed out first so Adam hit her thinking he was in the clear.

by TTM January 8, 2006

Back beauty

A girl who viewed from behind looks stunning but when viewed from the front resembles a horse.

I was standing in a queue the other day and I saw this girl from behind and she looked absoutely beautiful but when she turned around I realised she was a back beauty.

by goldfishmonkey May 23, 2007

back door merchant

a term used to describe a very gay man.

That fruity bastard is for sure a back door merchant.

by stillboy615 October 30, 2007

Back One In

A very significant bowel movement.

Thad: Do not go in the bathroom for the next hour!

Chad: Why broseph? The frat party starts in 30 minutes!

Thad: Trust me! Let it air out!

Chad: But why?

Thad: I had to back one in. And it was a healthy one too!

Chad: Huh?

Thad: You know: Dump some trout, Drop the kids off at the pool, Let one rip.

Chad: OK I gotcha. You could have just sent you took a massive dump.

by ZXY&ABC July 15, 2020

back a fatty

(v.) To stand up for a fat person, despite the fact that you are hurting your own reputation

Don't make fun of her just 'cause she's fat! She can't help it...

by psudonym March 7, 2005

back it up

What a guy says to a girl he's fucking from behind - asking her to push her ass back so she grinds onto him.

Also, in lesser used context, it means a girl has a nice ass.

*A couple doing it doggy style*

Chrissy: "Oh that feels so good!"
Tom: "Oh yeah, you want it harder?"
Chrissy: "Yes!"
Tom: "Back it up, back it up!"

by TJackson August 4, 2008