jackass
v.— «Jackass, jackassing—to move by manpower a tool ordinarily machine-powered. Manpower in general.» —“Machinists” by R. Pecheur, machinist, 147 Grand St.; Fearing Lexicon of Trade Jargon , 1938-39. (source: Double-Tongued Dictionary)
Further reading
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...