2
The euphoric, lazy, and disembodied feeling one has after busting a massive nut. Usually requires 10 minutes of recovery time. Symptoms include sweating, twitching, and minor paralyzation immediately following the discharge.
That girl sucked me so hard that I got a cumcussion
by TheDrunkenBulletTM May 15, 2013
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3
The resulting medical infliction resulting from the forcible impact of semen to the head.
"I rocked Jenny so hard in the dome with a load of spunk... she got a cumcussion and flew off the bed!"
by Dr. Fuck March 13, 2009
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4
Usually occurring during make-up sex after a lengthy, petty argument with a woman you are involved with, or any other time when a woman has been irrational.

Upon apologizing and engaging in make-up sex, the male uses that fake apology for the impetus of the move.

Yoking the female on his shoulders, mouth to vagina; aggressive and sloppy oral sex follows. With the female at a loud, 95% of full climax, male power-bombs female to the floor, leaving her in a euphoric daze she won't remember later, and might even thank you for.

The male is then able to go out with friends for drinks.
"The girls are here! But they're an hour late, we're missing the 1st quarter."
"Let's give them cumcussions and grab some beers at the game, then titty bar!"
"Hell yeah, I missed leg day at Cross Fit, that's perfect!"
by Mister Muff June 23, 2016
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5
When having sex as the woman begins her orgasm, she gets hit upside the head losing consciousness and her orgasm.
While screwing Erin senseless doggy-style, as she begam to cum I socked her head giving her a cumcussion.
by DJ Kleen April 20, 2011
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6
It's after you come inside your significant other (any way is acceptable), and then soon after punch them in the back of the head, rendering them unconscious.
"Hey Chris, did you hear that Reid cumcussed Catherine and is now serving 3-8 for domestic violence!"
"I suffered a cumcussion last night and I don't remember who I fucked"
by TheMistreatedBallsack69 January 02, 2017
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7
When you cum so hard in someone’s nose that it hit’s their brain, giving them a concussion.
I came inside Bri’s nose so hard last night that she got a cumcussion.”
by mattdaddy69 May 02, 2018
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