Capra Foraminis

Latin terminology for the perforation formed in the undergarments, primarily from chafing and acute disbursement of sharticles. Usually formed over great periods of time or sudden, violent episodes. Generally, the wearer is unaware of said perforation or chooses not to acknowledge.

Wife: WTF, can’t you see that?!
Husband: Oh, you mean my Capra Foraminis? Whatevs.