Green Mushroom 

A person who insists on one-upping you everytime.
Derived from Mario Bro's -1up

Person A: "I sprained my ankle the other day."
Person B: "Yeah well I broke my ankle once and got the flu. Plus I haven't slept in 48 hours. I'm so tired."
Person A: "You're such a Green Mushroom, Nick."

Green Mushroom by Meish January 14, 2009

Green Mushroom 

As in the Mario series when one gains a green mushroom the words "one up" flash on the screen, this is when you tell a story and someone else tries to tell a story better than you.

John: "i once skydived"

Bob: "yeah well i skydived and shot 4 ninjas whilst slaying a dragon and throwing the ring into Mt. Doom."

John: "Green Mushroom me again and you die."

Green Mushroom by jameswilson December 22, 2009

green mushroom 

Something one says when is given an unexcpected bonus.

Joerge not only gave me his stereo, but 5 CDs as well. So that was a big green mushroom.

green mushroom by Miyamoto October 10, 2005

green mushroom 

In an exchange of burns and insults, dealing a comeback better than the previous diss.

That was an awesome 1-up about his mom. You totally green mushroom'd him!

green mushroom by placatedmayhem July 2, 2007

pepperoni and green peppers, mushrooms, olives, chives 

Apparently it's what System of a Down likes on their pizza.

From SOAD's "Chic 'n' Stu"

What a splendid pie,
Pizza-pizza pie,
Every minute, every second,
Buy, buy, buy, buy, buy,
What a splendid pie,
Pizza-pizza pie,
Every minute, every second,
Buy, buy, buy, buy, buy,

pepperoni and green peppers, mushrooms, olives, chives
pepperoni and green peppers, mushrooms, olives, chives

pepperoni and green peppers, mushrooms, olives, chives by viva riolu May 31, 2011