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2.
When someone messes up a seemingly easy task.
Man, that fieldgoal kicker had a 25 yarder to win the game, but he really shtoinked it.
by B Cacic February 12, 2007
 
1.
A way to say mating, sexing, etc. Easier to say without feeling awkward. To shtoink, shtoinked, shtoinking, etc.
If mom and dad didn't shtoink, you wouldn't be here this very moment.
by Hotcocoagurl April 26, 2010