In a series of tweets, Wendy Liebman, Tammy Pescatelli and Kathleen Madigan all commiserated about Schumer allegedly lifting material from each of them.
"Between Amy Schumer doing 1 of my best jokes on her HBO special and this meme of my joke, I’m done with social media," Liebman wrote in a tweet that has since been deleted (the jokes in question can be seen here).
Comedian and "Arrested Development" writer Chuck Martin got in on the action and directed Liebman to speak with fellow comedian Kathleen Madigan.
Refinery29 was able to snap screenshots before they were taken down.
"What has always been amazing to me is that she purports to be a feminist and yet only steals from other female comedians. If we call her on it we are 'jealous' or career shamed. Be successful. WE want you to do well, just do it will your own material," Pescatelli tweeted on Tuesday.
Pescatelli also highlighted the "Slap Chef" sketch that appeared on the first season of "Inside Amy Schumer" as one of the jokes Schumer allegedly stole from Madigan (which in itself appears to have some origins in a joke told by Becky Donohue in the '90s).
Schumer denied the allegations on Jim Norton's SiriusXM radio show on Wednesday.
"I'm being accused of stealing jokes and I wanted to come and talk to you about it and clear my name," said Schumer. "Because I would never, ever do that and I never have. And I'm literally going to take a polygraph test and put it on my show this season."
Schumer also took to Twitter on Wednesday afternoon to again deny she had stolen any material.
And while Liebman's tweets set off the controversy in the first place, she has since gone on to deny that she ever accused Schumer in the first place.
Schumer was previously accused of lifting a joke from her friend, the late comedian Patrice O'Neal, in October 2015. When approached by TMZ about the lifted material, Schumer denied she'd ever done anything.
"The thing you’re talking about is -- Patrice is my really good friend I never saw him do that [the jokes in question],"Schumer told TMZ. "The thought that I would maybe see those jokes and then go, 'Ooh, I like those, I'm going to close my HBO special with them' is crazy."
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