TMZ.com

Jennifer Lopez Stands Up For Her Man | TMZ Live

A group of women in another car driving by happened to see Ben as he was coming around to his door -- and they did a good old-fashioned hollah! As soon as JLo heard 'em cat-calling at her hubby, she let 'em know how she felt about it right on the spot -- telling the ladies to "back up, bitch!" ... and in emphatic terms.

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