We've found 2 phrases for trench (0.147 seconds):

shoot oneself in the foot »    To deliberately sabotage an activity in order to avoid obligation, though it causes personal suffering. Origins in first world war trench warfare.

trench mouth »    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.

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