Borer may refer to:
Insects Common furniture beetle, also known as the common house borer Shoot borer Stemborer Twig borer Moths Chilo (moth) Southwestern corn borer Ash borer, or lilac borer Squash vine borer, a pest of cucurbit vines Ostrinia, pests of maize and other plants
Beetles Banana root borer, a true weevil Ptinidae, a family of beetles, especially: Common house borer Woodboring beetle
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 uses Borer Lake, United States , several ships בורר ("borer"), Sorting/Purification activities prohibited in Jewish law on Shabbat
See also Hotheaded Naked Ice Borer, a fictional mammal