Green’s Dictionary of Slang

filipinyock n.

[Filipino + ? hunyak n.]

(US) a derog. term for a Filipino.

[US]New Yorker 17 Oct. 19/2: Anyways, he happens to go under the name Joe—a Filipinyock. . . But still in all, he was strickly a wack from Wackland, that Joe [DARE].