Jaylen Brown labels Giannis Antetokounmpo a "child" for his fake handshake prank during the Celtics vs. Bucks game.

Jaylen Brown didn't seem to be a big fan of the Bucks star's fake handshake during the Celtics' win over the Bucks.

Jrue Holiday #4 of the Boston Celtics and Giannis Antetokounmpo #34 of the Milwaukee Bucks reach for a loose ball during the ...

Antetokounmpo elbowed Brown in the head then pulled the 5th-grade level fake handshake as a joke. Brown was having none of it ...

Celtics guard Jaylen Brown returned to action Sunday night against the Bucks after missing four games with a lingering hip ...

Celtics head coach Joe Mazzulla wasn't happy that Giannis Antetokounmpo didn't get whistled for a reckless play against ...

Boston Celtics star Jaylen Brown wasn't happy with Milwaukee Bucks star Giannis Antetokounmpo's handshake fakeout during ...

Celtics guard Jaylen Brown took exception to a fake handshake offered by Milwaukee Bucks forward Giannis Antetokounmpo in the ...

Jaylen Brown did not take kindly to a fake handshake from Giannis Antetokounmpo, calling the Bucks star 'a child'. Here's ...

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Milwaukee Bucks star Giannis Antetokounmpo offered a handshake to Jaylen Brown after committing an offensive foul against the ...