#6: Mugwump

Definition:

: one that withdraws his or her support from a political group or organization : a regular member who bolts a party and adopts an independent position

About the Word:

Mugwump entered the English language with the simple meaning of 'a person of importance'; after several decades the word began to grow and soon included political meanings. It comes from mugwomp (found in the American Indian dialect Natick), which means 'captain,' and was used in a humorous sense when it first began being used in English in the early 19th century.

Example:

"The Democratic 'mugwumps,' who had prepared a serenade and fire-works for 'President Tilden' uttered a despairing howl, and started South." — Ypsilanti (Michigan) Commercial, 18 Nov., 1876