Top Definition
you say this when your laughing so hard that your left testicle begins to fall off , why the left testicle?? no one knows
person#1:hey did u see that youtube vid i sent you?
person#2:yeah i was LMLTO!!!

male#1:yo remember that time you puled the hudini on that girl?
male#2:yeah LMLTO!!
by R.a.e1192 December 28, 2010
Laughing My Left Testicle Off. This is used when you are laughing so much that your left testicle is falling off.
jon: lets go on rf and annoy some nerds!
ash: lmlto yeh good idea!!
by Jon December 23, 2004
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