[f. KNACK v. + -ER1.]
† 1. One who sings in a lively manner. Obs.
c. 1380. Wyclif, Wks. (1880), 191. Ȝif þes knackeris excusen hem bi song in þe olde lawe.
2. Something that makes a sharp cracking noise; spec. a castanet. Now dial.
16234. Middleton & Rowley, Span. Gipsy, III. ii. (1653), E ij b. Our Knackers are the Fifes and Drums . Our Knackers are the shot that flie.
1647. R. Stapylton, Juvenal, 220. Castinettas; knackers of the form of chesnuts, used to this day by the Spaniards in their dances.
1649. W. Cavendish, Varietie, III. 43. A Bachanalian dancing the Spanish Morisco, with knackers at his fingers.
1877. N. W. Linc. Gloss., Knackers, flat pieces of wood with which children beat time.