Definitions

1. noun

A person, especially a politician, who refuses to belong to a party or who disagrees with the party’s actions or policies, often because of personal conviction or principle.

“The senator was known as a mugwump, refusing to join the party’s coalition.”

2. noun

A person who refuses to participate in a particular activity or who disagrees with its purpose or objectives.

“The activist was a mugwump in the community, refusing to join the boycott.”