A dirty jen is when your at a mall or burger shop and you uncontrollably explode diarrhea so bad that you cant even talk and your on the floor moaning and groaning and sweating everywhere, so the sucerty guard thinks ur on drugs as ur laying in a pile of your shit
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.