j-hook - Using your pinky to poke a girl's butt while you're having s

Using your pinky to poke a girl's butt while you're having sex. It’s like doing the J sign in sign language, but in a toilet.

My friend did a J-hook with his pinky and got caught by his sister.

I did a J-hook with my pinky and it felt awesome.

My cousin did a J-hook with his pinky and it was the worst.