The often recurring condition in which the state of one's face appears to feel as if it is "lazy," and/or "droopy" due to their current state of being stoned.

It could also be described as the condition of lacking initiative and motivation to move.
Man, Bob sure is suffering from a serious case of Lazy Face Syndrome L.F.S., he has been sitting in that chair doing nothing and drifting off into space this whole party.
by TheSmokeBloke July 22, 2008
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