Top Definition
This is when you think someone or something is so hilarious that your body is overcome with joyful laughter and pleasure at the same time. It is much like an eargasm or mouthgasm.
Jimmy Fallon is so funny, he gives me a funnybone-gasm every night!

I went to the comedy show last night and the comedian was terrible, no funnybone-gasm last night.
by chic14leo October 02, 2013

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