Buttony | Definition of Buttony by Merriam-Webster.

What is button in slang?

(slang) The clitoris. noun.

What type of word is button?

button used as a noun:

A knob or disc that is passed through a loop or (buttonhole), serving as a fastener. "April fastened the buttons of her overcoat to keep out the wind." A mechanical device meant to be pressed with a finger in order to open or close an electric circuit or to activate a mechanism.