Chris Kreider felt Matthew Tkachuk was getting a little too mouthy.

The Rangers veteran, at the end of an early third-period jaw session with the Panthers’ agitator in Game 4 of the Eastern Conference Final, tossed Tkachuk’s mouthguard into the stands at Amerant Bank Arena on Tuesday night.

Kreider and Tkachuk needed to be separated by a linesman just 48 seconds in the third period, with the Rangers star presumably sending a fan home with a one-of-a-kind, if not spit-laden, prize.

It was the latest in the ever-escalating tensions between the two sides as their Eastern Conference Final series continues.

The first three games of the round have been filled with big hits and plenty of pushing and shoving as both sides looked to get under the other’s skin.

Regardless of the Game 4 outcome, the series returns to the Garden for Game 5, home of hockey’s third-most aggressive fanbase, according to a Casino.org study.

Rangers fans have been out in numbers in NYC — and Carolina and Florida — this postseason.

They surely will continue to follow Kreider’s lead and be an unwelcoming force when Tkachuk and his Panthers teammates return to town.