beef
｟くだけて｠ 〖通例単数形で〗不平, 文句
"to complain," slang, 1888, American English, from noun meaning "complaint" (1880s). The noun meaning "argument" is recorded from 1930s. The origin and signification are unclear; perhaps it traces to the common late 19c. complaint of soldiers about the quantity or quality of beef rations.