MUGWUMP Meaning of MUGWUMP in English [mug.wump] n [obs. slang mugwump kingpin, fr. Massachuset mugquomp, muggumquomp war leader] (1884) 1: a bolter from the Republican party in 1884 2: an independent in politics Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012