36
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 June 10, 2017
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37
"The new Star Wars movie premieres Wednesday at midnight? I DEF need to get in line Sunday after lunch."

"I most def need to start yoga. I sound like the TinMan getting out of bed in the morning."
by HottieCumLaude April 25, 2015
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38
Short for definition. Used by the Urban Dictionary when listing your published definitions.
"Here are the defs you wrote:"

-Urban Dictionary
by colio177 November 02, 2015
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