Top definition
The last evolution of the grass type starter Pokemon in Pokemon Gold/Silver/Crystal/HeartGold/SoulSilver. Evolved from Bayleef, which was evolved from Chikorita. It can revive dead plants back to life with its breath.
Person 1: Hey, what starter Pokemon did you chose in HeartGold?
Person 2: I chose a Chikorita! It's already a Meganium! :D
by LevanJess April 24, 2011
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug
2
extremly large, king size penis.
"whoa! hakko you didnt tell me you weilded a meganium!?" - suckyfucker Mclickerson
by Hakko November 21, 2004
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug