In Colombia is a vulgar way to refer to a person who has no reason. It means wrong, be crazy, Cheeky, scoundrel, conchudo, insolent, impudence, cynicism.
1· It is vulgar " having courage " be very male. In this case, the egg is the testicle. 2· Have a zero grade.
Have egg: ( 41 colloquial expression; Be cheeky, be conchudo being scoundrel.