A person who ditches people, without them noticing. Probably because they don't want to hang out with them, or don't want to be seen with them.
Girl 1: Where's Shanaynay?
Girl 2: Damn! She just pulled a McQuicky on us!
by McQuickster December 04, 2008
Cheap, fast, violent oral sex in the bathroom stall of a McDonald's.
Lucy's such a slut! She gave Thomas a McQuicky last Sunday before church.
by l'enfant_jesus April 12, 2014

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