Mk is the slang used for saying Okay or "you okay" in a question. So say you asked someone to pick up onions, you would say "Pick up some onions, mk?"
You pronounce and say it the way that the M is not pronounced like the alphabet, but the way it would be pronounced in a word, for example the M at the beginning of Megan. The K is pronounced the alphabet way, however, i.e. not in the way you would say "kite". It also can be used to ask someone to do something, as in "Pick up Tommy, mk?" Instead of "Can you pick up Tommy?"
You pronounce and say it the way that the M is not pronounced like the alphabet, but the way it would be pronounced in a word, for example the M at the beginning of Megan. The K is pronounced the alphabet way, however, i.e. not in the way you would say "kite". It also can be used to ask someone to do something, as in "Pick up Tommy, mk?" Instead of "Can you pick up Tommy?"
by CallMeCorbett April 21, 2011
Get the Mkmug. An abbriviation of the name Mihael Keehl, which is the real name of the character Mello in the anime/manga, Death Note.
Person 1: DUDE! MK died in the Death Note episode last week!
Person 2: MK?
Person 1: Mihael Keehl!
Person 2:....Who?
Person 1:...Mello. Retard.
Person 2: MK?
Person 1: Mihael Keehl!
Person 2:....Who?
Person 1:...Mello. Retard.
by Mero-cakes August 22, 2008
Get the MKmug. by imacarnie August 18, 2005
Get the MKmug. by amanda December 24, 2003
Get the MKmug. Why did you go MK in the bathroom?
by high5er April 22, 2010
Get the MKmug. 
by Hankle June 13, 2006
Get the MKmug.