Bhangra in your pant is basically a saying of having tingles/ sexual tingles in you private area. Bhangra is a type of brown kids dance where you hop around, thus bhangra in your pant is basically some hopping/jumping around going on in your pant. It's the cool/funny way of saying I'm/you're getting a boner or i'm/you/he's/she's getting wet down there. LOL

When the “crush” has no intentions of taking things further, but they like the attention. So they flirt here or there, send dm/texts just to keep the person interested, knowing damn well they’re staying single.