n. An Indian chief, an Indian leader.n. A person of importance; a man of consequence; a leader.n. Hence— A person who thinks himself of consequence; a self-important man: a humorous or satirical use of the preceding.n. [In a “song” following the above, in the “negro” dialect, the same person is referred to as “ole mug,” and “honest, honest, mugwump coon.”]n. [capitalized] In United States political history, one of the Independent members of the Republican party who in 1884 openly refused to support the nominee (June 6th) of that party for the presidency of the United States, and either voted for the Democratic or the Prohibitionist candidate or abstained from voting.n. In general, an independent.Of or pertaining to a mugwump (in sense 2 ).[See also note following the first quotation under I., 2.]Of or pertaining to a political mugwump (in sense 3 or 4).To act like a mugwump; assert one's independence.