Top Definition
Laughing so Much that i Can't Breathe.

The extreme version of 'lol'

When something is extremely funny, causing the person or people to laugh so much that they can't breathe.
1. omg that was so LSMTICB!

2. please stop!, you're making me LSMTICB!
by stereospeaker January 04, 2009
5 Words related to LSMTICB

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