Top definition
The nether region of the female breast that rests beneath the shade of the overhanging tit
Girl: what's that I feel ?

Boy: well dear, I appear to have my hand trapped in your undercleft. I was reaching for a stray Dorito

Girl: fair deal. You may want to wash your hand.
by Ryan Statton and Co October 20, 2015
Get the mug
Get a undercleft mug for your bunkmate Rihanna.