A skank. A whore, a slut, take your pick. A quick easy (cheap) lay.
Guy 1: Did you hear about Sam? I heard she slept with some random dude at that party!
Guy 2: Yea man, I heard that too; did you hear about the last party? I heard she totally gang-banged!!
Guy 1: Yea man, she's such an easy cheese...
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.