Top definition
Short hand for "You Motherfucker," used in social settings with friends that are open to crude jokes and are not easily offended
Popularized most famously by the character J-Roc on the TV show "Trailer Park Boys"
"Shit, man, you better get up on dat piece, YeMaf"
"Dayuum, YeMaf, you should'nt have hit that club last night, Denise is all kinds of furious"
"Man, you better back off outta here, YeMaf"
by Jir'Usai August 20, 2014
Happy St. Patties Day!