Source : Webster's Revised Unabridged Dictionary (1913)

Keck \Keck\, 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.

Keck \Keck\, n.
   An effort to vomit; queasiness. [R.]