The state of mind engendered by any level of sleep deprivation, most notably accompanied by a highly likelihood of laughing--often hysterically--at something that, with a normal night's sleep, would normally be categorically unfunny.

I don't know what that kid just said, but I'm subtarded enough to think it was funny

subtarded by Hipp April 23, 2005

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Tiptarded

To the end that "tipping" refers to enjoying the occasional road soda whilst cruising with a friend down your local thoroughfare, a tiptarded individual would be one that did not learn to drink while riding in a car at the appropriate age, and therefore is not ever capable of mastering such as skill.

"Dude, that was totally 5-oh that we just passed. Why the hell would you take a drink of that Old E forty just then?? You are so tiptarded..."

Tiptarded by dissident19 July 9, 2009

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