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U_______
Definitions
an unexpected winner; someone who defeats the favorite competitor
Word origin
From upset + -er.
Used in a sentence
“And so were all Christians in Pliny's time, insane like others, and called not long after, followers of madness, upsetters of men, vicious innovators […]”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer0 curated clues
No curated clues for upsetter yet.