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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.
by Mweb February 26, 2015
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Jun 13 Word of the Day
No Bull Shit, and old hacker acronym which is usually used to signify that the talk will be serious.
User: I need to talk to you, NBS.
User2: ESAD, Noob.
by Heko July 17, 2004
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