When a woman covers your nose with her vagina, and puts her butt hole to your mouth. She then lets out a nasty fart, thus filling your lungs with dirty air. This was originated by a girl name Jenny, thus the name.

A nasty roach; the harsh end of an almost completely smoked joint or marijuana cigarette

Dirty Jennie is when a girl is so desired that the persons craving her has the most dirty thoughts about what they would do to her if giving the opportunity.