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2.
A cross between two purebred breeds of dog, the Maltese and the Yorkshire Terrier.
"My Yorkshire Terrier female got caught by the next door neighbor's Maltese, so we decided to call them Malkies and sell them for hundreds of dollars."
by K9Trainer5 January 22, 2007
 
1.
Local to the West Coast of Scotland (especially Glasgow) & having been used since the late 1960's/early 1970's to describe in slang terms, the act of head butting another individual (see also Malky)

I'm led to believe that it's also been used in printed stories & rhymes, again locally in the Glasgow/West of scotland area, by the likes of the Glaswegian poet & wordsmith, Liz Lochhead, (who was invited to read some of her work to my schools drama classes, during the school year 1981 - 82).
"...Ho, see that dobber over there that's lookin at me oot the corner o his eye, he's gettin a dose o the malkies afff a me, if he doesn'y gee it a by."
by Mmalkie May 20, 2006
 
3.
A loser who has no life. Somebody who thinks he is cooler than he is. Somebody who jacks off in his cereal and laughs about it online at work. Somebody who has a big ass head.
Dude, you're such a Malkie!
by Darth Ignant January 06, 2005