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1. LIMHS
Laughing in my head silently
used when you think something's funny but you're not actually laughing out loud.
LIMHS, that was pretty funny.
2. LIMHS
An e-mail term much like LOL. It stands for Laughing In My Head Silently.

Commonly used when a joke is not LOL-worthy, and not too funny. Just mildly funny.
"Ohmigod, did you hear that joke about the rabbi and the frog? Total LIMHS."
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