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used to counter someone's far fetched claim of a trick they or someone they know landed but didnt film it; usually its something hard to believe. most commonly used by people on message boards like the fags on slap forum.
gay fag: "i just nollie inward heelflipped the tampa big four block"
smart fag: "footy or it didnt happen"
by TeeBonetheCrackhead July 11, 2009
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