The act of fingering a girl up her asshole, right after she has taken a shit, then you pull your fingers out and have leftovers all over your fingertips.
“Damn, my girl really wanted me to do the dirty PJ on her”
When you use the same wash cloth you washed your balls with to wash your face and then breathe in deep.
Last night I accidentally did a Dirty PJ. It smelled amazing!