Borer

Borer may refer to:

Insects

 * Common furniture beetle, also known as the common house borer
 * Shoot borer
 * Stem borer
 * Twig borer

Moths

 * Chilo (moth)
 * Diatraea grandiosella, southwestern corn borer
 * Podosesia syringae, ash borer or lilac borer
 * Melittia cucurbitae, squash vine borer, a pest of cucurbit vines
 * Ostrinia, pests of maize and other plants

Beetles

 * Cosmopolites sordidus (banana stemborer), a true weevil in genus Cosmopolites
 * Ptinidae, a family of beetles, especially:
 * Anobium punctatum, common furniture borer
 * Woodboring beetles

Devices

 * Cork borer, a tool of the chemistry laboratory
 * Raise borer, a mining machine
 * Instep borer, an instrument of torture
 * Tunnel boring machine
 * Reamer, a rotary cutting tool used in metalworking
 * Drill

Other

 * Hotheaded Naked Ice Borer, a fictional mammal
 * Borer Lake, United States
 * בורר ("borer"), Sorting/Purification, one of the activities prohibited in Jewish law on Shabbat