lshmicoomn 

An extreme case of "lol", whence the subject is laughing so hard milk is coming out of subject's nose.

American gent: "lshmicoomn"
Norwegian bloke: "Dude, is that milk coming out of your nose?"

lshmicoomn by porwe May 2, 2009

lshtmicoomnaaridnu 

acronym for "Laughing so hard that milk is coming out of my nose at a rate i do not understand" commonly used to describe something that is extremely funny

Nathan: OMFG did you see that dudes bitch tits?
Kenny: Yeah dude i was totally lshtmicoomnaaridnu

lshtmicoomnaaridnu by Kenny Payne, Nathan Rivas April 10, 2008