Stump break is the same as stump bust except it is commonly done on the farm and to farm animals when they're still young. It's the act of tying a horse, cow, or other farm animal to a tree or stump so they cannot get away and mounting them sexually.
Dad: Boy, we've got a long day of work today. We've gotta stump break 5 colts and that mule today.
Son: But dad, I just fucked 7 calfs yesterday.
Son: But dad, I just fucked 7 calfs yesterday.
by eddievanhoglen August 10, 2006
When an individual living the state of Texas, stand upright on a tree stump so as to position his groinal area close to and engage in a sexual manifestation of penile nastiness with a COW.
My penis is covered in fly larva because of my promiscuous actions while stump breaking last weekend.
by Wamba September 16, 2003
by Hugo-Sticky Tits October 7, 2010