Similar to the Dirty Sanchez. While pounding your girl(or guy, whatever your pleasure), you rub and make slow semi-circles around her asshole and the without warning you JAM your finger in her ass. When she turns around to yell HEY!! you give the ole' fish-hook. The shit on your finger resembling rust on a hook. You can go for the Double Rusty Fish-hook, but you need to stick another finger in your own ass right before you jam it in her and then WHAM-O!

The act of putting a finger up an ass hole while hitting it from behind then sticking it in there mouth.

when your having sex doggie style and you stick your finger in her ass and reach around n grab her by the cheek and pull

when a male inserts his 2 index fingers into a females anus during the doggystyle position, then removes them and reaches forward and hooks the corners of the mouth and pulls back violently.

When having sex in the doggy style position, you pop your index finger in the brown hole, then pull it out and insert into the receivers mouth. Very similar to the "Fish Hook" which is the same thing without the "rust".

you stick your finger in your own butthole, and then walk up to your victim and put the the same finger (in the shape of a fish hook) into their mouth and the inside of their cheek. Then pull like you are catching a fish.

When you stick your finger in your butt, then make a hook with your finger and hook a friends lip