1.when something stops you from gettin with someone, not just for sex. someone stops your flirtin, makes you really pissed.
2. cry for help when a guy is trying hard to get a piece and you dont want him too, you tell your friend to box block.
1. i was flirting with him all night and then right when he was warming up that bitch came and box blocked me!
2. that guy was getting all up ons so i texted my friend to box block.