NBA's Alan Crabbe DESTROYED By Heckler For Odell Beckham Hairstyle

Would-be hecklers and game-disrupters listen up ... THIS IS HOW IT'S DONE.

The victim is Portland Trailblazers star Allen Crabbe ... and here's video of him getting absolutely PUNISHED by a heckler during a game last week against the Memphis Grizzlies.

Subject of the heckle? Crabbe's Odell Beckham Jr.- inspired hairstyle ... and the smack talk is sooo good that at one point even Crabbe has to laugh.

BTW, Crabbe (who has a $75 million contract) had just 6 points in the game so ... mission accomplished, brother.