pony yogurt

A thick curdled residue found in equine semen harvesting gear. True pony yogurt develops after semen harvesting equipment is used many times without being cleaned.

Rancher 1: Hot damn! What is that smell?
Rancher 2: Aw, that's just Jeanine. She finally got around to cleaning that horse cock sleeve and now she's got pony yogurt up to her elbow!