To fart into one's cup shaped hand and throw the stinking air into another's face.
"My room mate Dan threw a stink fist at me today"
Symptoms for someone who suffers from B.P. Syndrome has consumed a copious amount of alcohol at a social gathering, usually someone young, who ends up crashing the party by shitting one selfs pants.
"My god hes got B.P. Syndrome doesn't he??"
"It sure smells like it!"
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