Appearing at the New Yorker Festival, in conversation with Michael Schulman , Bridget Everett brought her dog onstage. It was unconventional, but no more so than anything else she does. Vulgar, badly behaved, and entirely comfortable with herself, Everett’s persona as a cabaret performer whips audiences into a frenzy at the legendary Joe’s Pub, in New York. That cult following led to parts on the television shows “Inside Amy Schumer”, “Lady Dynamite,” and “Girls,” and in the movie “Trainwreck.” But Everett found a new depth in last year’s “Patti Cake$,” as the barfly mother of the movie’s title character, who is a young, overweight white woman aspiring to be a rapper. Everett’s character, Barb, is a failed singer who mocks her daughter’s musical career. “I get the urge to want to tear somebody down even when you love them, because you don’t want them to slip away, or you don’t want them to have something you never had,” she said. “If I was still in Kansas and I wasn’t singing, and I wasn’t doing what I want to do, that’s exactly who I would be. And I would be that drunk and I would be at that bar, hopefully not with those nails, but I would be that person.” *This episode contains explicit language.