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A cliff at dolime quarry in Guelph Ontario. The name came to be when some drunken idiot (read: typical cliff jumper) tried to spray paint "Jump In" but managed to spell "Gjump In" which has now been shortened to "gumpin". A gumpin is also a measurement. 1 gumpin = ~25ft a gumpin is not a static measurement because a gumpin is defined as "the distance from the top of the cliff to the water" thus a gumpin is never the same.
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