Top definition
fart my self sleeping

similar to pmsl (piss my self laughing)

when the natural occurence of passing wind occurs during sleep
Jane: 'Oh my god you should have heard Tom last night in bed. He suffers from really bad fmss

Diane: Yeah my Harry sleeps with his bum sticking out of the bed just in case, every night!
by mcdonaldspd September 25, 2010
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