- “to keep MUM,” to hold one’s peace. Hence “MUM’S the word,”—a phrase which implies to all hearers that the matter to which it refers must remain secret.
More About mumPosition in the dictionary: 2272 of 4022 slang words.
Next words in the dictionary: mummer, mump, mumper, mumps, mundungus, mungarly, mungarly casa, munging, muns, murerk
Previous words in the dictionary: multee kertever, mullingar heifer, mulligrubs., mull, muggy, mugging, mug-up, mug, mufti, muffin-worry