A confrontation between Bills players and one Eagles fan on Sunday grew so contentious ... it actually ended with Shaq Lawson shoving the Philadelphia supporter.
It all happened just before Philly beat the Bills at Lincoln Financial Field ... when a throng of Buffalo players got into a verbal argument with a man in the stands wearing an Eagles-colored beanie.
You can see in video shot by a bystander, Bills defensive lineman Jordan Phillips first got into the man's face ... while Lawson, Greg Rousseau and Ed Oliver joined in on the spat just steps behind.