Top Definition
The state of being extremely high, usually to the point where smoking additional marijuana will no longer be effective.
(Dude #1) Dude... what's up with Grandma? She didn't even realize she spilled bong water on herself.

(Dude #2 Cracking up) Ah, that's alright. She's whacktarded, let her have fun.
by MrPeepersNJ December 22, 2010

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