Obs. exc. dial. [OE. þaccian, app. onomatopæic. Cf. THWACK.]
† 1. trans. To clap with the open hand or the like; to pat, slap lightly. Obs.
c. 897. K. Ælfred, Gregorys Past. C., xli. 303. Swa [swa] wildu hors, ðonne we h[ie] æresð ʓefangnu habbað, we hie ðacciað & straciað mid bradre hande. Ibid. (a. 900), in Cockayne, Shrine (1864), 185. Hine lyst bet þaccian and cyssan ðonne oðerne on bær lic.
c. 1305. Land Cokayne, 141. To þe maid dun hi fleeþ And geþ þe wench al abute, And þakkeþ al her white toute.
c. 1386. Chaucer, Millers T., 118. Whan Nicholas had deon thus euerideel And thakked [MS. Petw. twakked] hire aboute the lendes weel. Ibid., Friars T., 261 (Harl. MS.). This carter thakketh his hors vpon the croupe.
† b. intr. To beat, to shower blows. Obs.
1480. Caxton, Chron. Eng., ccxliv. 292. Our men of armes and archyers that thakked on hem so thikke with arewes.
† 2. trans. To clap (something) on or in a place.
1542. St. Papers Hen. VIII., IX. 42. But here he thakked on as many wordes, as he did bifore lawes in the other parte.
1589. R. Robinson, Gold. Mirr., 31. The thorny thumps that Thought did thacke Within my wofull breast.
3. mod. dial. To THWACK, bent, flog.
1861. Quinn, Heather Lintie (1863), 22 (E.D.D.). Ye weel deserve a thackin For tellin [etc.].
1904. in Eng. Dial. Dict. (Norf.), He rarely thacked th old dicky (donkey).