A term used to describe how large a mans penis is.
Girl: Wow you have some big metal gear!

Boy: thanks!
by Mr.Terry July 10, 2008
An lvl 15 equip in the game MapleStory.
Noob: Zomg!!! I finally have blue metal gear!!!
High Level: Umm, dude, thats like, nothing!
by thenoobkilla August 28, 2006
Metal Gear is something that people yell out when something bad happens. (refrencing Solid and Naked Snake from the metal gear solid video game series)
McDonald's drive thru: I'm sorry sir but our shake machine is broken.

by Maso-man June 27, 2016
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