look up any word, like lemonparty:
 
1.
Slang term for Magic Mushrooms, from fungi
You bringing that fun guy to the concert with ya or are you going to leave him at home
by C March 31, 2003
 
2.
An animation and gaming studio that makes amazing games, like Sqwishland and Actionjetz
I wish I could make a game like Funguy.
by sqwishland September 14, 2011
 
3.
a homosexual male; a booty-bandit
Although he is straight acting, Julius is a fun guy.

Having any Backstreet Boys songs on your iPod is fun guyish behavior.
by Shay-Ron April 26, 2008