cojonero 

Someone who has sex with a lot of women.
Sex cowboy.

He is such a cojonero.
That cojonero is getting a lot of action.

cojonero by Arnold Scrimshaw May 20, 2008

cojonera 

noun same as "blue balls", e.g. how the male genitalia hurts after a prolonged time of arousal without orgasm.

Person A: Shit, she kept me all horny for three hours straight. And didn't even jack me off in the end.
Person B: No joda, debes tener cojonera...

cojonera by alpha_male74 March 9, 2009