it is reffered to somes ones bum,
either boy or girl

The second time you attend a certain event.

can be used while talking about sexual acts, workin it, puttin your back in it

When you need to go somewhere for whatever reason, and you don't want to be there on your own, so you get a few (or one) of your friends to come with you so it looks like you have friends.

verb. 1) to tell someone to "chill"; relax, fall back. 2) commonly used to shut down a stupid remark or completely end a conversation. 3) also used to completely shut down a stupid action another person does. 4) a more stronger form of the verb consists of a double back; i.e. "BACK BACK!". this phrase originated out of the vicinity of Mt. St. Joseph High School in historical Irvington, around the period of 06-07 school years. Its popularity has grown and continues to flourish amongst the Mt. St. Joseph Community and is begining to spread at a rapid paste. Although to term's weight itself is hard to grasp, one must take time as practice to completely master its effectiveness

see corresponding examples from definitions...

a slang word for the US Dollar.

Plural for back

The collective backsides, or asses, of a group of good-looking females.