Definitions from Wiktionary (Thumper)

▸ noun:  One who thumps.
▸ noun:  (slang) A single-cylinder engine, especially four-stroke engines or those with large engine displacements.
▸ noun:  (uncountable) A drinking game wherein players must remember personal hand signs while being distracted by others banging on a table.
▸ noun:  (slang) Something big, such as a lie; a whopper.
▸ noun:  (UK, rail transport, slang) A kind of slam-door train introduced in the late 1950s.
▸ noun:  (US, military, slang) The Vietnam-era M79 grenade launcher (due to its distinctive report).
▸ noun:  (Antarctica) A short rope for beating disobedient sled dogs.
▸ noun:  (informal) A strong adherent to a religion or ideology.
▸ noun:  A surname.

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