Eric Musselman is a man of his word -- the Razorbacks head coach partied shirtless after a HUGE upset win over #1-ranked Auburn on Tuesday night ... and it was epic!!
Here's the deal -- Muss met with a group of Arkansas students outside Bud Walton Arena in Fayetteville before the game ... and was asked if he would do a topless celebration if they knocked off the top team in the country.
Not only did coach make the promise, he kept it after Arkansas knocked off Auburn, 80-76 .