Jeffrey Bertan Cohen (né McMahon; June 25, 1974) is an American attorney[1] and retired child actor best remembered for appearing as Chunk in the 1985 Steven Spielberg production The Goonies.

[5] Cohen was one of the children describing words to the contestants on the 1982–83 CBS game show Child's Play.

In the final scene of The Goonies, when the families gather on the beach, Faye has a cameo as Chunk's sister.

According to the commentary track on The Goonies DVD, the chickenpox on Cohen's chest can be seen during the "Truffle Shuffle" sequence.

I think that was in his acting and now in his law practice.Cohen used introductions from Goonies director Richard Donner to get summer jobs on the business side of movie studios; he would say about that time in the ABA Journal story, "I grew up loving The Three Stooges and the Marx Brothers, but suddenly I had a new crop of heroes."

He chose to pursue a legal career upon finding out that many of the most important figures on the business side of Hollywood had law degrees.