broken spokes
When a girls ass has been pounded so much that the lines of her ass hole (the spokes) are bent, twisted, or broken looking.
she's been ass fucked so much that she's got broken spokes.
Broken Spokes
When aperson only enjoys having sex in their butt, eventually the sphincter will stretch out and quit snapping back. It starts to resemble a bicycle tire with broken spokes.
Kevin insisted on taking his boyfriend's 13" cock up his butt. Years of being the receiver had stretched out his sphincter, Everytime he farted it sounded like he was yawning. His boyfriend told him that he definitely had the worst case of "broken spokes" he had ever seen.