1) A guy who cheats while still saying he loves you.
2) A guy who is married or in a "committed" relationship and still hits on you.
3) A guy who says he's really interested in you and then has sex with another woman.
4) A guy who leads you on, tells you he has feelings for you and won't end the relationship he is in or begin a relationship with you.
Example 1-
Girl 1: I thought you were going to get with this guy?
Girl 2: I was but it turns out he's a totaly Testiclous lackitious!
Example 2-
Woman 1: So what happened to make you and your husband get a divorce?
Woman 2: I found out he was Testiclous lackitious.