Source : Webster's Revised Unabridged Dictionary (1913)

Yuck \Yuck\, v. i. [Cf. G. jucken, D. yeuken, joken. See
   {Itch}.]
   To itch. [Prov. Eng.] --Grose.

Yuck \Yuck\, v. t.
   To scratch. [Prov. Eng.] --Wright.