a.To be so high that you actually believe you cannot move. Can be a good or a bad feeling.

b.To be stoned to your seat. Usually happens when watching TV. In both cases, you have an overwhelming sensation that you feel like a large boulder.
Dude, I have to pay my guy for the weed we just smoked, but I'm so seat stoned right now I can't even think about getting up.

guy 1. Hey, what happened after I left last night?
guy 2. Not much. After we smoked that bud I got seat stoned and passed out.
by part irishman September 16, 2009
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