IdiomThe AbsurdEnglishCrude

if my aunt had balls, she'd be my uncle

Meaning: A crude retort to pointless speculation: change enough facts and anything becomes true, so the hypothesis proves nothing.

Example: “"If he'd studied, he'd have passed." "Yeah, and if my aunt had balls, she'd be my uncle."”

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Origin: A vulgar piece of folk logic with close relatives across Europe: the French "si ma tante en avait, ce serait mon oncle," and the Italian and Yiddish versions in which a grandmother with wheels would be a cart or a wagon. The English form is an informal saying passed along in speech, and no first appearance or date is documented.

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