1.return money to sb.
2.to punish, or to revenge sb
1.I pay back money to the building society every month.
2.I will pay him back for his bad treatment.
The hole in your butt. Mostly known as your butthole.
I have to go crack my back clam!
The history of the story. How the story became news. The rest of the story.
I've heard this used on CNN a couple of times. "Back story" is used when talking about a breaking news story, when the rest of the story isn't clear. "What is the back-story on the train crash?" Meaning how many were on the train. When did it leave, and how fast was it going?
It's the water that comes back up from the commode and hits your butt when you poop.
Boy, There sure was alot of splash back that time my butt got sooked.
What you tell some one when they are asking you for something that you don't want to do just to get them out of your way.
John: Hey can I borrow 20 bucks
Terry: Oh I'll get you on the way back.
Completely meaningless phrase which has gained inexplicable global popularity. It's an incomplete thought: Back in what day? It's a redundant way of saying "Once, I..." or "I used to..." and adds words without adding any extra meaning. Similar to the equally pointless "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.
A dirty whore who is always on her back and takes it in the Vag...
A.K.A. Billy's Mom
Man I feel horrible, I climaxed in that matress back.