The act of inserting ones toes into a vagina whilst flicking your big toe on the clitoris. Typically an act of foreplay but can also take the place of sex. Originated at the University of Florida by the freaky college students there.
*Julia and Ryan are having sex*
Julia: this sucks
lets try something new. Why dont you try clit clunking me??
Ryan: I guess, its been awhile since ive clipped my toe nails though..."