Meaning

originPerhaps borrowed through obsolete Dutch mompen (“to cheat, swindle, deceive”), according to Kroonen, a derivative of Proto-Germanic *mump- (“to stain”), perhaps from Proto-Indo-European *mm̥bʰ-neh₂- Also akin to German mimpfeln (“to mumble”), Icelandic mumpa (“to take into the mouth”). See also English mum. While Kroonen claims Ancient Greek μέμφομαι (mémphomai, “I blame, accuse”) and the…

Etymology from Wiktionary, CC BY-SA 3.0