1 definition by My Worst Nightmare

Top Definition
lmm
The scientific term for the sound that is made when someone tries to sing a song underwater.
"I would have liked the Little Mermaid, but I watched the 'from-the-beach' version, and all I heard was a bunch of lmm-ing."
#sing #water #music #hum #beach
by My Worst Nightmare September 25, 2006
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