Definitions by Peter Combs

manboy 

1.A man who acts like a boy.
2.A man who looks like a young boy.

Dude, do you always have to be so damn obnoxious? You're such a manboy!
Damnit, I get carded everywhere I go, Must be because I look like such a manboy.

manboy by Peter Combs August 17, 2006