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1. deffy
Slang for "definition".
Yo teach, what's the deffy of "missile tits"?
2. Deffy
Shortened version of definitely. Often used by teens.
A: "Look at that"
B: "That's cool"
C: "Deffy"
by Sarah Jun 28, 2004 add a video
3. deffy
To make an emberassment of oneself. To fail at suicide in an attempt of gaining attention.
Deffy slit his wrists like a little school girl.
by anonymous Oct 2, 2003 add a video
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