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 3, 2017
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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 January 13, 2018
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1.When you ejaculate so hard you get a concussion
2.When you ejaculate so hard you slam your head against a wall during your climax.
Dude I had such good sex last night I got a cumcussion.
by JimDal December 12, 2016
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when you're making out with someone and you smash your girlfriends head on the wall.
Damn this man really gave me a cumcussion!!!!!!
by Chickentenderbaby! November 21, 2020
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When a dude blows so hard on. The back of her throat that she is given a concussion.
Cody blew so hard he gave Melanie a cumcussion.
by Andotgsw August 2, 2023
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When a dude blows so hard on. The back of her throat that she is given a concussion.
Cody blew so hard he gave Melanie a cumcussion.
by Andotgsw August 2, 2023
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When you ejaculate in her throat and shake her head
She told me I gave her a cumcussion last night during foreplay
by Jammerhead May 3, 2022
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