ROFCOF

Acronym: Rolling On Floor Cum On Face

A natural progression from LOL, ROFL, and ROFLMAO.

Implies that something has caused such hilarity that it has caused such a person to shoot onto their own face while rolling on the floor laughing.

Guy1: That was so funny - LOL
Guy2: Yeah i know - ROFL
Guy3: ROFLMAO - brilliant
Guy4: ROFCOF!!
Guy1: Ew - dude
Guy2: Not again...
Guy3: WTF?! Why?!