Nutty Kid
A sex slang term for when a guy fucks a pregnant woman hard enough for his penis to go far in her vagina so that the nuts slam on to the unborn fetus.
Preggo: (MOANING) Hey! can you try to fuck a little softer?
Guy: Why? I thought you to do it this hard.
Preggo: Well I'm pregnant! Your shoving your dick so hard up my womb I can feel the balls on my nutty kid!