b-bomb
When a guy is trying to flirt with a girl and she drops her boyfriend's name like a bomb to shut him up.
'Oh, I have a boyfriend.' 'Oh, really?' 'Yeah, and he's not here to save me.'
'You're cute, but I'm taken.' 'By who?' 'By my ex who still texts me.'
'You want to hang out?' 'I can't. I have a boyfriend who's watching my Instagram.'