An especially fine woman's butt.
So ladies (yeah), ladies (yeah)
If you wanna role in my Mercedes (yeah)
Then turn around
Stick it out
Even white boys got to shout
Baby got back

All credit humbly given to Sir-Mix-a-Lot
by baby got it goin' on February 13, 2004
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A reference to the buttocks, usually referred to woman who have a bigger than normal ass.
"Daaaammmnnnnn, baby got back!"
by Alex A. February 18, 2003
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A back is a non-alcoholic drink served alongside a shot. Backs are also sometimes called chasers. Sometimes a small beer served alongside a shot is considered a back.
Gimme a shot of whiskey with a coke back.
by Learn to Swim August 12, 2008
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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...
1) Stupid Kid: "Hey man guess what I did last weekend?"
Beastly Kid: "What man?"
Stupid Kid: "I got so much ass from these hott chics from _______"
Beastly Kid: "Uh... BACKKK!"
2) Stupid Kid: "Hey man you know who u look like?"
Beastly Kid: "Who?"
Stupid Kid: "Abe Lincoln hahaha"
Beastly Kid: "BACKKK!"
3) Stupid Kid: (decides to go to weight room and put on some rap and dance to it)
Beastly Kids in Weight Room: "BACKKK!"
4) Stupid Kid: "Dude im so nice at basketball"
Beastly Kid: "Uh... Back"
Stupid Kid: "Yo i'd fry you"
Beastly Kid: "BACK BACK!"
by Ca$h MunE May 18, 2007
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Being awesome, feeling awesome, or doing somthing awesome.
example 1
Dude 1."Dude i just smoked that blunt"

Dude 2."How do you feel"

Dude 1."I feel fuckin back!"

example 2: "Holy shit i just caught a fly! im fuckin back!!
by 606 Brick squad big joe November 29, 2010
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Support. A term used to describe backup.
"Oh, snap! Don't mess wit dat busta! He got crazy back!"
by NT June 14, 2003
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