RhymeZone: chugger definitions

Definitions of chugger:

noun: (informal, derogatory) A street fundraiser, especially a private contractor, working on behalf of a charity, who is aggressive or invasive.
noun: One who chugs a drink, especially an alcoholic drink.
noun: (fishing) A type of fish lure or fly that makes a popping or chugging sound when twitched.
noun: A vehicle, train or boat with an engine that makes a chugging noise when running.

(Definitions from Wiktionary)