Top Definition
Used when ordering coffee and you want half regular and half decaffinated.
I'll have a tall half-caf latte on the fly.
by Tentochi February 11, 2005
a nick name for someone,when rating them...they are a 5 out of 10
dude: "omg dude that chick jackie is such a half caf!"

other dude: "ya i know right, she doesnt even know what it means thats why its so funny"
by bro dude man January 24, 2012
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