Top Definition
1. An individual taken to major mood swings and irrational behavior. May also be used to describe large intake of big-gulp soda and fast food.

2. The outright flop of a musical or theatrical production.
The day was going fine before that old lady at the supermarket went salivar on me.

The New York Times panned the musical as one of the biggest salivars of the year.
by Yoyo ma February 08, 2006
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