Green’s Dictionary of Slang

hink (out) v.

[hinky adj. (2); note comment at hink n.]

(US) to become or appear nervous, frightened.

[US](con. 1964–8) J. Ellroy Cold Six Thousand 240: Pete walked right in. Peavy hinked. [Ibid.] 604: Pete got goose bumps. Pete hinked out. Pete hinked out boocoo.