mugwump (n.) Look up mugwump at Dictionary.com
1832, jocular for "great man, boss, important person," American English, from Algonquian (Natick) mugquomp "important person" (derived from mugumquomp "war leader"); used from 1884 of Republicans who refused to support James G. Blaine's presidential candidacy, hence "one who holds himself aloof from party politics."