Wiktionary
trench mouth
n. (context idiomatic medicine English) acute necrotizing ulcerative gingivitis, a severe bacterial infection of the gums, typically characterized by inflammation, bleeding, deep ulceration, necrotized tissue, pain, fever, enlarged lymph nodes, fatigue, and halitosis.
WordNet
trench mouth
n. an acute communicable infection of the respiratory tract and mouth marked by ulceration of the mucous membrane [syn: Vincent's angina, Vincent's infection]
Usage examples of "trench mouth".
Flocanalog did not see it until he crossed the trench mouth of the map face.
After eating off wormy, moldy trenchers, one would get 'trench mouth.