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1.
To make less retarded
"I'll need a few minutes to detard this plan of action you've come up with."
by Captain Neckfat January 15, 2008
 
2.
Someone who has learnt the error of their ways.
He was a moron but now is a detard.
by -db- August 12, 2003
 
3.
not a retard see uptarded
by troon August 12, 2003
 
4.
(v) Editing the work of a coworker who is a) mentally challenged, b) addicted to crystal meth, or c) doesn't give a flying fuck.
I would love to grab a drink, but I will be stuck in the office all weekend detarding Jimmy's weak ass proposal.
by WilGo August 09, 2013