Past tense of "it's on. "
Usually said to mark the beginning of a competition or skirmish of some sort, possibly of a spontaneous or unexpected nature.
The two breakdancers briefly sized one another up, but then the beat started, and it was on.
February 26, 2015
Once a girl ass has reached size 10 or higher.
Do you have that in FAT for my double digit super sized ass?
© 1999-2015 Urban Dictionary ®
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