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To ejaculate during an "imtimate" IM conversation with a stranger and block them immediately afterwards.
Girl - That Bastard just did a cum and run on me, i'll never get to know his asl.
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Mar 1 Word of the Day
One who has a mania for music.
I am a melomaniac.
by Larstait November 14, 2003
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to cum on a girls face after intercourse, and quickly grab your things, run out, and never return again.
Last night I gave Jodie a mean dirty harry, and pulled a cum and run. I couldn't find my underwear though, but it was a feasible sacrifice.
by ChrisCash April 18, 2011
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basically when you nut in a woman to make them pregnant and then you flea the city or country.

What my dad did
Mum why isn't dad here

Because he did a cum and run

Mum your a milf
by BigFatAlan July 24, 2019
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When you bang a girl you just met at a club in the bathroom, then leave after ORGASM leaving the condom on the floor for someone to slip on.
Carl asked Tim why he looked in pain after leaving the bathroom and he just replied
"I just went into the aftermath of a cum and run"
by Googleplex69 May 25, 2016
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