From The Collaborative International Dictionary of English v.0.48 [gcide]: Keck \Keck\ (k[e^]k), v. i. [imp. & p. p. Kecked; p. pr. & vb. n. Kecking.] [Cf. dial. G. k["o]cken, k["o]ken.] To heave or to retch, as in an effort to vomit. [R.] --Swift. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Keck \Keck\, n.
An effort to vomit; queasiness. [R.]
[1913 Webster]