1. A person with a mental deficiency
2. An offensive term used to refer to someone acting in an irritating or generally stupid way.
by Tom September 17, 2003
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Jimmy: 2+2=51
Tom: Jimmy You are a retard
by FrizzlePlayz April 27, 2017
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People who think they have to take their pets with them everywhere they go.
That retard left their dog in the hot car with the windows rolled up at Walmart again.
by Spanky420247 March 23, 2014
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larry's retardness is rediculous this is the third time this week he locked himself in the bathroom.
by garrett10121 July 31, 2008
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Synonym for delayed, generally used when referring to ignition times of car engines.

Also the #1 trigger word in social media for some reason, even though worse and more unambiguously derogatory words exist, such as nigger, and most people use it to just colloquially describe something bullshit, you know, WITHOUT making fun of the mentally disabled.
Facebook user 1: Have you heard about the mayor's decision to raise taxes for low-income families?
Facebook user 2: Yeah, ruining chances of those who hardly had any to start with? That's just retarded.
Autistic person:
Random Canadian girl: TRIGGERED
by Someone32143214 November 4, 2019
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