do an Ellen
To do an Ellen is when you're outside and really need to pee, so you pee on the street (preferably between two cars).
guy 1: 'dude! I really need to pee but there are no toilets'
guy 2: 'it's fine! There are two cars over there, just do an Ellen'
guy 2: 'it's fine! There are two cars over there, just do an Ellen'