Simping
'Simping' is the art of trying to act like a girl's boyfriend when you don't really even know her, when she already has a boyfriend, or when she has explicitly stated she is not interested in you romantically. The 'Simp' convinces himself that he is more important than he actually is AND that he is sexually desirable to his person of obsession. It's nothing but a delusion, but you bet your ass he will do anything and everything for his person of obsession, especially if she has a boyfriend. If she's got a boyfriend, the 'Simp' goes into full competition mode and sets himself out to prove he 'does things her shitty boyfriend would never do'. For his efforts, the 'Simp' receives almost nothing in return from the person he has targeted, and rightfully so. 'Simps' spend their money, time, and life giving everything to someone who gives them nothing in return except maybe a little attention every now and then just to keep them on the hook. Also, this is really important, some women are aware of the simp(s) in her life & some aren't. It all depends on the situation, so don't automatically assume every single female has a horde of 'Simps' that she's using to pay her rent and car insurance every month. However, If she is aware of her simp(s) AND has not cut them out completely, then you bet your ass she is entertaining them ever so slightly to be able to get what she wants out of them. More power to her though, you go girl, that's a fucking sweet deal.
Jason is simping hardcore, bro. He's giving Gabby rides to and from work every day, and he spent $250 on her birthday present. She even told him that her boyfriend forgot to get her a present, and that's the last thing he needed to know because now he's convinced himself he actually has a chance!