The phrase used when a person is sweeping the floor and someone steps right into the pile of sweepings
said person has gathered, accidentaly or deliberately, and scatters all of it back across the floor, causing the person to have to restart.
Idiot: Hey what's up man? (walking across the floor)
Sweeper: Oh, not much just sweeping the floor because my girlfriends coming over later.
Idiot: That's kool, well just let me get out of your hair.. (stepping on sweepings, scattering them)
Sweeper: Get off my sweep you bastard!!! Great now I have to start over. Just get out!
Idiot: This is my place?