What is Rusty Motorboat?
1.
When someone places their lips in the recently used/dirty butt crack of someone else, makes the "Brrrrr" sound of a motorboat, and shakes their head back and forth very quickly.
SEAN pooped himself a work and didn't have any toilet paper so KELLY gave him a Rusty Motorboat to clean him up.
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Random Words:
1.
The worst of all insults, because it combines all the nostalgia of your mother with the ripping surrealist vibe of your face. Or someth..