“He has a streak of Moyshe Kapoyr in him.” (NJY)

“Don’t argue; don’t be a Moyshe Kapoyr.” (NJY)

“He gets things so balled up, so topsy-turvy, his name could be Moyshe Kapoyr.” (NJY)

"Everybody wants to go out for Italian but he insists on Chinese! ...What a Moishe Kapoyr!" (source)