barrack-room lawyer

Noun

slang

(military slang) A know-it-all.

Japanese Meaning

（軍隊俗語）何でも知っていると自負する、口うるさい知ったかぶりな人

When the squad leader asked for suggestions, the barrack-room lawyer piped up with a lecture on the regulations.

分隊長が意見を求めると、兵舎の知ったかぶりが規則について得意げに説教を始めた。

Sense（1）

(military slang) A know-it-all.

Senior Sergeant Grossmith: Hooked yourself a regular barracks room lawyer, I see.

barrack-room lawyers

（ plural ）