nope, n. — Green’s Dictionary of Slang

nope n.

[15C northern dial. nawp, noup, nope, a blow; ult. a supposed Scandinavian v. nawpe, to strike down]

a blow to the head.

1725		New Canting Dict. n.p.: nope a Blow, a Knock on the Pate; as, We hit him a Nope on the Costard.
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. 1725].
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1859		Matsell Vocabulum.