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ROFLCL is a compound acronym combining ROFL, Rolling On Floor Laughing, and FLCL, Fooly Cooly, an anime.

It is a tack-on statement to ROFL that supports the fact that the one speaking is both an internet user and anime watcher. It is used as a statement by itself, like ROFL, or can also be used as an adjective (see example).
Ex. 1
"<insert witty joke here>"

Ex. 2
"Did you see the AMVs at the kon?"
"Yeah, they were totally ROFLCL!"
by Off Duty Ninja July 03, 2008
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