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1.
"Rolling on the floor laughing my fucking ass off pissing my pants."

When you really are laughing hard on msn to someone if they say something that is just too funny to only say "lol"
me: *saying something funny*
friend: rotflmfaopmp
by NoEFromFGF August 17, 2009
 
2.
Rolling on the floor laughing my fucking ass off peeing my pants.
1st person : "joke"

2nd person: ROTFLMFAOPMP
by darkwhite July 20, 2009