A small football club knocks out a supposedly superior rival in a cup competition.
GOAL Chasetown 1-0 Cardiff
"Oh my word, what a Cupset we might have on our hands!"

(source BBC Sport 606).
by _Lister January 05, 2008
An upset in the FA cup.
Oh my god! Accrington Stanley just beat Chelsea 4-2 in the FA cup. What a cupset.
by robertfrench January 05, 2008

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