A peca cuerpoespin is a big, fat, dumb, spikey haired dude who likes to stalk the ladies. Will usually look like Baymax from Hero 6 or Sullivan from Monster's Inc.
Dude #1: Yo, who's that Sullivan lookin dude stalking those chicks?
Dude #2: I don't know bro, but he sure looks like a Peca Cuerpoespin!