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Basically it's when you motor-boat someones butthole. A sexual partner places his/her lips inside the butt crack of their partner and exhails forcefully while turning head from side to side. This will generate a motor-boat like sound.
"Stacy quivered with excitement as Jennifer crab boiled her naked ass crack"
by NWpolitik December 29, 2016
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Nov 23 Word of the Day
A massive dump that takes 10 to 15 times to flush.
After Thanksgiving, I had to Take a Trump.
by JRBIV December 11, 2019
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