One Cleveland Cavaliers fan may have made a devastating NBA Finals loss for the Golden State Warriors even more infuriating for fans, teammates, point guard Steph Curry and his father, Dell Curry.

Jennifer Hayashi, who goes by @chilloutjen on Twitter, posted a video of her friend Aaron Smith dissing Dell Curry in what looks like a prank.

In the video, a man walks toward Dell Curry with his hand out, as if going in for a handshake. When Dell Curry puts his hand out to shake in return, the prankster instead dabs.

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Dabbing, made popular in sports by Carolina Panthers quarterback Cam Newton, is a dance created by hip hop trio Migos.

The dance is essentially lifting an arm bent at a 90 degree angle and bowing your head into your elbow.

The tweet got the attention of ESPN reporter Bomani Jones and Sports Illustrated.

Not everyone found the diss dab funny.

Although Jen dismissed critics by saying, "It's just a joke," she admitted her friend was silly for doing it.