Top definition
(short for) definitely (esp. in web chat and texting)
I'll see you there, deffo
by dilbert scrunchie June 20, 2003
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2
Kinda lame but useful and funny way of saying for sure or definately.
Also; fo deffs, def, deffy def, deffo McDefferson.
by Jake May 08, 2005
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3
Gothenburg wigger slang. Short for definitely. Also used instead of "for real", when wanting to point out that something is very true or given.
- I deffo need some weed right now.

or

- This crib rocks!
- Deffo!
by Japfreak January 03, 2004
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4
Short for definately.
Said in normal conversations.
"I'm defo keen to get fucked up."
by Diego August 30, 2003
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5
Should we move forward on this deck? Deffo.
by par ez January 11, 2013
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