1. A guy who, whilst being straight, enjoys a finger
in his rectum during sexual relations. Also known as a Finger
2. A person who enjoys putting his/her finger
in men's anuses and playing with the prostate gland.
"Yo, bro, you gotta try it.. get your missus to stick her finger
in your ass right before you blow, it's awesome."
"You're such a Walnut Tickler, cuz Cliff"