What does the speaker mean? [br] [originaltext]"I learned a lot of street smart

"I learned a lot of street smarts during the years when I had to walk through Times Square to my office every day. I walked with confidence, was aware of people around me and held on to my purse real tight."

Yesterday, my roommate chewed me out. He said I always make a mess in the living room, and he is tired of cleaning up after me.