blowin up the spot
when someone does something to attract unwanted attention to a place where one is hanging out. When you're kickin it somewhere blowin some dro outside and someone starts yellin, thats blowin up the spot.
Man shut up! I'm tryin to roll a blunt up, and you're yellin and shit. Chill out, you're blowin up the spot!
blowin up my spot
When someone brings too much attention to something that you may be wanting to keep on the low. So much so, that they may get you caught and or in trouble.
That dude over there's the fool who was blowin up my spot last night. Because of him my girl knew I was out with another girl last night.