To make a cuckold or cuckquean of someone by being unfaithful, or by seducing their partner or spouse.
A West Indian plectognath fish, Rhinesomus triqueter.
The scrawled cowfish, Acanthostracion quadricornis and allied species.
A man married to an unfaithful wife, especially when he is unaware or unaccepting of the fact.
A man who is attracted to or aroused by the sexual infidelity of a partner.
To be sexually unfaithful out of one's home