(Sustantivo)
Una persona a la que le están siendo infiel.
(Noun)
A person that’s being cheated on.
Ejemplos (Examples):
Ahí va el cuernú.
There goes that guy whose wife has been cheating on.
No sabe que es una cuernua.
She doesn’t know she’s being cheated on.
Oí que el vecino es un cuernú.
I hear the neighbor’s being cheated on.
Slang, Informal, Vulgar