look up any word, like thot:

1 definition by Gilldrew Anespie

 
1.
Footballing occurrence in a cup competition where a team placed significantly lower down in the football league overcomes all odds and defeats the higher-ranked side.
Oldham are 1-0 up on Everton, we definitely have a cupset on our hands!
by Gilldrew Anespie January 12, 2008