1 definition by Rammy12

Top Definition
When someone has either smoked marijuana to the point where they feel deflated and the possibility of physical activity is out of the question
OR.
When the weeds rank of dank makes you that way. The name comes from the above the influence commercial called "flat".
Other symptoms of being flat include being anti-social
That weed made Emily so flat yesterday, she couldnt even move her arms
by Rammy12 November 04, 2010

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