Top Definition
When a guy finishes sex with a woman by pulling his tube steak out of any of her orifices and cascading a hefty load that is so abundant that it coats her hair.
Tim- Did you get it in last night?

Me- Totally. Cristina was concussion-proof after the Cum Helmet I gave her.
by MeezyGeezy February 12, 2012
1 Word related to Cum Helmet

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