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Cum In Mouth. Meaning ejaculation of the man's sperm into anothers mouth. This may or may not be followed by the swallowing of the cum
The naughty girl enjoyed cim
by Davor April 16, 2006
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Cock in mouth / Cum in mouth
invented by a twitch streamer name Fedmyster to express something really good/feel good
this well-done steak is ver CIM
by fortnutfan13 November 18, 2018
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Acronym.

"Crawing In My Skin!"
<whymelifesux> I hate my life. Everything I ever try to do ends up hurting me in the end.
<Me> LOL! CIMS!!
by ownagemasterex October 27, 2005
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