LekhoriLekhoriAngry, distressed, or unhappy
He was upset when she refused his friendship.
Feeling unwell, nauseated, or ready to vomit.
His stomach was upset, so he didn't want to move.
From Middle English upset (“the act of setting up; establishment”), from Middle English upsetten, corresponding to up- + set. Cognate with Middle Low German upset (“setup; arrangement”).
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An unexpected victory of a competitor or candidate that was not favored to win.
But it is probably the biggest upset for the away side since Ronnie Radford smashed a famous goal as Hereford defeated Newcastle 2-1 in 1972.
An overturn.
"collision and upset": impact with another object or an overturn for whatever reason.
To tip or overturn (something).
1924, W. D. Ross translator, Aristitle, Metaphysics, Book 1, Part 9, The Classical Library, Nashotah, Wisconsin, 2001. But this argument, which first Anaxagoras and later Eudoxus and certain others used, is very easily upset; for it is not difficult to collect many insuperable objections to such a view.