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1.
Dafy is the quality of something being a dope ass mothafucka (daf). This can apply to wide range of nouns and objects. For instance, the President, a car, or even an idea for an invention can be "dafy".
"We went to the mall looking for fly swag and came out with some seriously dafy shit."

Potential female sex partner: "Wow, see Aymeric over there; he's dafy!"

P. Diddy: "Oh this song right here is DAFY!"
by AVJesus November 28, 2011