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Short for mother fucker. Used by J-Roc on the Trailer Park Boys.
I gotta get some food up in ma pony, mafk!
by AnabolicJ July 21, 2006
That girl is one sexy mafk!
by HAZE February 07, 2013
Mentally away from keyboard, eg daydreaming.
"Sorry, what were you saying? I was mafk for a bit there,"
by Nyaa June 04, 2005