An acronym that stands for "Chuckling under my breath" instead of lol/laughing out loud. As no one really laughs out loud when using the lol acronym.

Generally used via text messages or online social media messaging apps.
Friend: Sends a funny meme
Me: That made me cumb
by Justina Beiber February 29, 2020
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Used to describe male or female ejaculate, once it has dried up and become crispy, flaky crumbs.
"Karen I told you to clean up properly after our shenanigans last night, and now there are Cumbs all over the bed!"
by Faei January 7, 2020
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To be in a state of complete relaxation, usually achieved by use of narcotics (weed).
I am so nomfortably cumb after that last joint.
by KentishP=NP February 14, 2017
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Cumb: when you cum so hard it makes you lose a few IQ points and become dumb.
Friend: did you go out with that girl again?

You: yeah, I made her cumb.
by Tofu tooth September 9, 2021
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