armpit

 
Pronunciation: /ˈɑːmpɪt/

noun

  • a hollow under the arm at the shoulder. Also called axilla.
  • informal, chiefly North American a place regarded as extremely unpleasant: they call the region the armpit of America

Phrases

up to one's armpits

chiefly US deeply involved in a particular unpleasant situation or enterprise: the country is up to its armpits in drug trafficking