The nectar of the Gods. Smoother than the Mt. Dew, better tasting than Vault. It has just the right amount of caffine, and it will make your penis bigger.
Girlfriend: WOW! Your penis looks bigger!
You: You bet! I've been drinking Mello Yello!
by Hodgii October 30, 2007
A asian that smokes alot of weed. Therefore does not give a single fuck.

It is recommended that you do not cheat off them on test, because they do not study as much as there hard working counterparts.
Kevin: Hey look at all those asians smoking weed behind the bleachers.

Jim: what a bunch of mello yello's.
by jackie wang November 18, 2012
Pretty much just an imitation of Mountain Dew *angel chorus*. Most people think it doesnt have any caffiene in it at all, but it does. Yup.
Dude, Mello Yello? Wheres your MD?
by Locolan August 05, 2006

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