Theoretically, yes. But no, physically impossible.

you'd green before u OD....

No. You can't overdose on marijuana.
I googled this because it actually aroused my curiosity.
I feel like you should have done the same before making a yes or no question thread about it.

humanly impossible

Not unless it's laced.

you can't OD on weed.

Possible? Yes. Plausible? Not unless you're a jolly african-american living in mexico surrounded by piles of brick weed.

no,but try,i bet ull feel bad after

You'd probably throw up or fall asleep or both before you got like 10% of the way to consuming enough of it to die.

This post was edited by phoenixfire711 on May 8 2011 08:18pm

From urban dicionary...

buy marijuana overdose mugs, tshirts and magnetsA once-popular misconception held by anti-marijuana advocates, perpetuated by drug dealers and gangsters lacing selling-marijuana with other, more harmful drugs to induce physical addiction in their buyers.

Technically an impossibility, as marijuana does not cause fatal, or even considerable damage in the short term (not counting injuries sustained while under the influence).

Commonly used as an often-misinterperated metaphorical arugment that if you have taken enough of a drug to have gone completely out of your gord, you've taken a "dose" more of it than you should have.
High-Strung Joe- "Stop smokin' that, dude! You're going to have a marijuana overdose, dude! It happened to Crazy Collin after he bought from that toothless dude we found in the sewer! Willie? WILLIE!?"