This last name is often found in those who are interested in things such as the office, trailer park boys, saturday night live, and borat.

They are usually also very uneducated and ignorant.
"Did he just say great success? He must be a McGillis".
by VeryNiceHowMuch November 21, 2019
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A girl who is so loose her man can get not two fingers, not three fingers, but the whole hand up her pussy.

The rare Double Fisty McGillis does exist. She has the unbelievable talent of being able to fit two hands up her puss.
That ho is a straight out Fisty McGillis!!
by Twigs January 13, 2005
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