An insulting term for female Marines. Comes from the word "Teufel Hund" which is German for "Devil Dog". A female dog is called a bitch. The term hails from the
World War I "Battle of Belleau Wood" where the
Marine Corps wreaked havoc on German forces and "earned their nickname" "Devil Dog". Use with caution, especially if you are in the Guard or Reserves where a significant portion of their personnel are pulled from the Marine Corps. Only Navy and Chair Force servicepeople are stupid enough to use this
derogatory term, but hey, Marines eat crayons, so who are they to judge?