Asked who should succeed Mr Corbyn as Labour leader, Ms Flint said: "I don't think it should be anybody who has had a hand in our Brexit strategy over the last few years, and I don't think it can be Corbyn without a beard, I think that would be the wrong move as well."
Ms Flint earlier said she was trying to "stem my anger" as she criticised "ardent Remainers" within the party - naming Sir Keir Starmer, Emily Thornberry, Hilary Benn and Yvette Cooper - for having "contributed to sacrificing 59 seats".
She told Sky News's Sophy Ridge On Sunday: "I don't believe anybody who have been the architects of our European policy in the last few years is credible to be leader - I don't think they can win back these seats."
She added: "Keir Starmer led us to a policy that did not listen to Labour leave voices who urged caution, he led us down the path of a second referendum, and I'm afraid Emily Thornberry did as well - she said to one of my colleagues 'I'm glad my constituents aren't as stupid as yours'."
Emily Thornberry denies Caroline Flint's claims.
"This is a total and utter lie. I have never said this to anyone, nor anything like it, and I hope needless to say, it is not something I would ever think."