The biggest insult

Spitting in someone's face is not trash-talking. There's no bigger insult.

That's why Hollywood shows it as the ultimate act of hostility and contempt.

Think Gerald McRaney's villainous mining magnate spitting into the mug of William Sanderson on HBO's Deadwood— then forbidding him to wipe the spittle from his face.

Or Tom Berenger spitting on Charlie Sheen in Platoon.

Or the aptly named revenge film I Spit on Your Grave.