Molly
the name for an alcoholic who falls out of bed in the morning, rarely showers, and can name the entire Del Taco menu off the top of their head 

a derogatory term for a moocher. will feed off of other people's food as though it were their own 

the worst roommate in the world 
That girl was such a Molly  she kept eating off my plate last night, and she smelled like dirty feet