abbreviated to WTH, which is a derivation from WTF (what the fnck) which came into being when it was discovered that Kate from Kate's Playground has one foot and one cloven hoof.
Used in much the same way as WTF, but more specifically when you see something weird/unexpected.
Guy1: Kate from Kate's Playground is hawt
Guy2: Look at this picture of her foot
Guy1: WHAT THE HOOF?
All: keekles
A particularly large, unruly, malodorous, and sinister looking vagina, often known to elicit strong feelings of fear and dread in unsuspecting sexual partners.
Upon finally seeing her cloven stink hoof after six long months of taking it slow, Satan wept.