When someone says something outrageous.

Tim: Im the realest n*gga alive
Dave: You a Futty Dutty
by YoungDonDotta February 24, 2014
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A dirty whore that likes to drink cum after having sex in the anus.

Do Not Try this at home... you never go ass to mouth.
Jackie: gosh that girl is such a tramp!!!
Heather: Yeah I heard from Tim that she's a cum-guzzling futty dutty.
by []D[][]V[][]D#5 November 7, 2006
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