pail of steam
other.— «“Pail of Steam”—This is another joke direction to a greenhorn worker, to take a pail and go get it full of steam.» —“Trade Jargon—Carpet Industry” by Ellis H. Custer in Westchester and Yonkers, N.Y. Lexicon of Trade Jargon Mar. 23, 1938. (source: Double-Tongued Dictionary)
Further reading
The adjective corny describes someone or something “unsophisticated” or “naive.” This sense of corny goes back at least as far as the 1920s. Seed catalogs of the time often contained bits of goofy jokes and broad humor...