look up any word, like cunt:
 
1.
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
 
2.
That girl is one sexy mafk!
by HAZE February 07, 2013
 
3.
Mentally away from keyboard, eg daydreaming.
"Sorry, what were you saying? I was mafk for a bit there,"
by Nyaa June 04, 2005