This is always after he begins a relationship and follows the instructions of his partner.
Deriving from the Latin Yegah meaning snail and the ancient Hebrew Nii meaning snake, a Yeghni has very similar features of both.
Guy 2: No my friend, he's got a girlfriend now... cor blimey, he's turned into a right old Yeghni ain't he!
Guy 1: Nooo... Samir... A Yeghni? I never thought it would happen to him.