Top Definition
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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