the act of putting your hand in your dirty, nasty ass crack and then shaking hands with someone you do not like.
i had a meeting job meeting with some guys i did not like, so i shitfisted them all.
by devilace July 24, 2009
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One who fists in the ass, especially after ones partner has not wiped after a shit
That Underwood is a real shitfister
by gek of Arabia October 10, 2004
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Repeatedly inserting your fist into one's anus while the victim is shitting.
So I walked into the classroom and found a crowd of retards shitfisting eachother laying fecal matter all over the walls.
by funiek February 23, 2014
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