Varmint rifle

Varmint rifle is an American English term for a small-caliber firearm or high-powered air gun primarily used for varmint hunting — killing non-native or non-game animals such as rats, house sparrows, starling, crows, ground squirrels, gophers, jackrabbits, nutria, marmots, groundhogs, porcupine, opossum, coyote, skunks, weasels, or feral cats, d...
Found on http://en.wikipedia.org/wiki/Varmint_rifle

varmint rifle

A small-caliber firearm or high-powered air gun primarily used for varmint hunting
Found on http://en.wikipedia.org/wiki/Glossary_of_firearms_terms

Varmint Rifle

A relatively heavy rifle, firing a relatively small-bore, high-velocity bullet, with precision optical sights and great accuracy, (often single-shot), used to kill vermin such as prairie dogs and gophers with no thought to harvesting the meat.
Found on http://www.hallowellco.com/abbrevia.htm
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