Top definition
A nerd who has not yet reached puberty mentally and has not yet expressed an interest in the opposite sex. Mainly of the male species and often plays Megaman or PSP or similar video games and has lame LAN parties and such.
"Hey, that guy's kinda cute. Wanna go talk to him?"
"Are you kidding me? Only from this far away. Up close, he's the epitome of a loser mcloserson!"
by hey797 March 14, 2010
Get the mug
Get a Loser Mcloserson mug for your daughter-in-law Sarah.
Any guy who is a science nerd, doesn't yet like girls, plays random video games, and talks to teachers for fun. Often named Martin.
by losermcloserson January 13, 2010
Get the mug
Get a loser mcloserson mug for your cousin Georges.