dial. and techn. [f. FETTLE v. + -ER1.] One who fettles; spec. in various trades.
1871. Daily News, 18 Aug. The cloth finishers, dressers, fettlers, and willeyers, are taking steps to obtain a general advance.
1883. Almondbury & Huddersf. Gloss., Fettler, one who cleans up; especially one whose business it is to clean machinery, engines, &c.
1884. Cheshire Gloss., Fettler, one who sharpens the knives of the fustian cutters.
1892. Labour Commission Gloss., Fettler, the person who cleans out the fudd and dirt that accumulates in the cards of the scribbler and condenser.