his eyes wander. he usually talks to ALL THE FEMALES. he's shady, even when it seems like he likes you (you can just sense you're not the only girl his attention is on). if he flirts or flatters you a lot, chances are he flirts and flatters every other chick. he has a bad reputation/sleeps around. you catch him in a lie all the time. or he cheated on his last girlfriend.
Ask if you can look at his phone. If he says no for any reason he's probably a pla
Arrogance and a lack of depth are usually pretty good signs. If he's a pla
He might wear a jersey, or carry around a ba
Not letting you see his cell phone.
If you think he constantly lies, he's a pla
another sign is he's very jealous - a thief thinks everyone steals and a player thinks everyone cheats
i tried to live with a cheating femme-fatale once, and she taught me quite a lot
He's on a playing card.
He has rewards card around his neck, and if he is ask him to share the comps.