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1) To make unhappy.

2) Unhappy; angry.

3) To defeat a favored opponent.

4) A victory over a favored opponent.
1) Eric upset Alexandra by buying her mints, as she thought he was implying her breath smelled bad.

2) Catherine was still upset; she hadn't gotten over Mary's rude behavior at the party.

3) Lucas upset Dino, the nieghborhood's best tennis player, in the best-of-three-set match.

4) The White Sox scored a major upset over the over the Twins when Buehrle pitched a comple-game shutout.
by Diggity Monkeez February 17, 2005
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A one-word summary of Super Bowl XLII.
After winning every single game and not losing one, it was a spectacular upset to finally lose in the championship game (especially against a team they beat in a spectacular regular-season encore).
by nick weiner September 07, 2008
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When your boyfriend comes home late and then he tells you he couldn't phone because he wasn't allowed!!!
God damnit, why can't you tell I'm upset?!?!
by niknaks December 10, 2005
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upset is an acronym for ultra pigheadedness starting every time
I know when I upset someone. I wonder if the fact that my time from submission date to publication date has gone up from no weeks to one week in Urban Dictionary means I have upset someone or are the editors becoming busier.
by Stias October 10, 2005
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Except for; With the exclusion of; other than; but
Its super cool upset for the boring parts.
by michelle February 22, 2005
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