thumper
n.— «They key to shooting any powerful gun, and especially a thumper, is to roll with it, not fight it.» —“Re: HARD KICKING 45-70’s & 444 Marlins” by Ken Marsh (kmarsh@charm.net) Usenet: rec.guns June 16, 1996. (source: Double-Tongued Dictionary)
Further reading
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Some TV commercials launch catchphrases that stick around long after the original ads. The exclamation Good stuff, Maynard! is still a compliment almost 40 years after it was used in a commercial for Malt-O-Meal hot cereal. And: what do you call...