Hyaenaing

The act of a man or a woman posing as a "friend" of an already taken woman or man waiting for the first opportunity for that womans or mans significant other to make a mistake and turn it into an opportunity to get with the target.

1. - You should do something about that Marco guy, he's straight up hyaenaing your girlfriend.

2. - He isn't your friend. He's waiting for your boyfriend to irritate you so he can say "Ya know I wouldn't treat you like that. You deserve better." He's a hyaena.

3. - Jennifer's my new girl cause I straight up hyaenaed Dave.