Unlike the Dirty Santa, you do not have anal sex first. You simply ejaculate on your partners face creating a beard of semen, resembling that of santa's.
I gave my girlfriend a nasty santa on christmas eve.
by KrystalDM June 11, 2006
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When a Big'n'Tasty is smashed into one's taint.
Brad just got a big nasty santa fe from logan.
by Twiggles02 April 6, 2008
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v. When someone takes a Big'n'Tasty from McDonalds and then smashes it into somebody else's taint.
You sure got one hell of a Big Nasty Santa Fe the other day.
by Twiggles02 April 3, 2008
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