Person 1: Look at that cowboy riding that cow!
Person 2: No, a person who rides cows is called a horseboy.
Person 1: Why?
Person 2: Ask whoever came up with the idea that someone who rides horses is called a cowboy.
In the mainly gay, mainly fetish and leather community, someone who 'keeps house' in exchange for bed and board, often with a sexual and/or D/s relationship attached. Compare sugar daddy.
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.