Top Definition
An Alien Life Form from the planet Melmac with an appetite for cats'. It's hieght is around midget and it is covered in brown fur. To this day only one has ever been seen, yet numerous items have been produced bearing it's image such as lunchboxes, backpacks, magazines, etc. While known for his "Yo Willie" catchphrase ALF also was a master of disguise thus explaining why the Ochmoneks never caught on.
stoner 1: "Dude look at that big ass brown cat on t.v."
stoner 2: "Hey man, that ain't no cat, that's an alf."
stoner 1: "What's an alf?"
stoner 2: "You know, Gordon Shumway."
stoner 1: "Oh yeah, wait what were we talking about?"
stoner 2: "I don't know but look at that big ass brown cat on t.v."
by Nick Bockwinkle April 12, 2008

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