Def is when you're too lazy or your IQ is too low and you don't know how to properly write the word "Definitely". So instead of looking uncultured and write shit like "Defenitely" or "Definetly" etc. you Def that shit and save yourself from embracements.
I'm def a retard I'm def gonna beat my meat after writing this definition.
By Yung Iboprofen
Origin: " Definate " " Def " : To strongly concur with a previously made statement.
Wes: Man i'm bored... is your dealer home? Mike: Def dude :D.
By Wriech
Word commonly used in place of "definetly"...most often heard when in the presence of Julie and Mandie
Julie- Getting drunk later, though? Mandie- Def.
By Mandie
short for definetly...
"that is most def the best damn thing i ever saw"
By Allison
short for "definatley"
"That is def the ugliest thing I've ever seen."
By Laurie *is hot*