San Francisco Slip n Slide

1. Human or, in lesser instances, animal feces found carelessly deposited on a sidewalk, parking lot, or other place where people commonly walk, originating in the notorious behavor by the homeless of San Francisco, California.
2. The act of inadvertently stepping into feces under such conditions.

“Yesterday while walking downtown, I ruined a brand new pair of shoes. I wasn’t paying attention and accidentally stepped into a San Francisco Slip n Slide.”