Slut Ninja

One who is capable of sneaking around and having sex with many people without being detected by the others, especially applicable when married or in a long term relationship.

Carrie is a real slut ninja. She's fucking her co-worker, her neighbor, and the guy at the car wash. Her boyfriend doesn't have a clue.

Jug Bat

A very large penis. Usually referred to when describing the penis as being so massive in size and girth that all it's good for is slapping up against a womans body parts, most often their jugs.

When Jason went on his blind date he had no idea that the woman he was with had a particular fondness for a man with a jug bat. He was pleasantly surprised when the woman requested a little jug slapping.