When you pee in someone else's pants while they are wearing them.

masturbate to a horror movie alone in the dark while your hand is numb.

When a penis is extruding out of a mans underwear

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The Krazy Stranger is when one coats thier hands in Krazy Glue, lets it dry, and Proceeds to "Rub one out".

To sit on both your penis and dominant hand until both are numb, then proceed to pleasure yourself. Since you've lost feeling in both, it feels like watching a person receive a handjob.

When you sit on a hard, wooden chair until your ass falls asleep so that your buddy can rail you from behind without it being gay.