Top Definition
The act of holding your straw like a knife and then shanking your buddy's large McDonald's cup on the side in an attempt to make a huge mess. This only works with the large cup since it's the only one made out of styrofoam .
Leo (thinking): I should McShank Hans just because i'm bored....

*Leo then McShanks Hans' large cup*

Hans: Hey man! WTF! you ruined my cup and made a mess!!!

Leo: How You Like Me NOW!!!
by EldeEp June 29, 2009
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