bunker buster

plural bunker busters

1. governmentA bomb designed to penetrate hardened targets or targets buried deep underground.

   The bombs used in the strikes were GBU-57A/B Massive Ordnance Penetrators, known as a “bunker busters,” two sources familiar with the operation said.

   2025 June 21, Kevin Liptak, “Strikes on Iranian nuclear sites thrust US into escalating Middle East conflict”, in CNN

   1 more example

   B-2 bombers are the only plane capable of carrying the Massive Ordinance Penetrator, which experts have highlighted as the only type of bomb potentially capable of destroying Iran’s underground Fordow nuclear facility. Each B-2 bomber is able to carry two of these “bunker buster” bombs, which weigh an impressive 30,000 pounds each.

   2025 June 21, Thomas Bordeaux, Natasha Bertrand and Zachary Cohen, “US moves B-2 bombers as Trump weighs Iran options”, in CNN