When you spread a girls legs completely apart and ram your penis into her with the force of a car colliding with another automobile at an intersection.
Last night I was fucking my girl Anna, and I T-Boned the shit out of her. She's not going to be able to walk for days.
When a man cheats on a beautiful woman. Not just any man and not just any woman. It has to be public, it has to messy and they have to be attractive. Joe Shmoe can't T-Bone his wife Jane Doe but a famous dude can.
Why is this referred to a T-Bone? Because dogs, when they have a juicy bone and stare into the reflection they see a bigger bone...they will drop the juicy real bone for the illusion of the better bone. Now we take that up a notch and use T-Bone because it's a higher grade of meat. Enough said.
Tiger Woods totally "T-Boned" Elin Woods and man did she take one for the team.