Someone who seems to be fascinated or obsessed with, ahem, the "nether" regions.
All Jordan does anymore is tell toilet jokes--he's turned into a such a nasty ass butt weasel.
by surfbird March 03, 2009
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I buttfucked your moter last night,and she was the nastiest buttweasel that I ever rooted!
by sancho pancho August 21, 2003
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A person of either or both genders that likes to crawl up others butts! it is simply their favourite pass time. False and a walking oxymoron!
stop being such a buttweasel Katrina
by getinthecar! am lion:P August 18, 2014
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