The Collaborative International Dictionary of English v.0.48:

Urticate \Ur"ti*cate\, v. t. & i. [imp. & p. p. Urticated; p.
   pr. & vb. n. Urticating.]
   To sting with, or as with, nettles; to irritate; to annoy.
   --G. A. Sala.
   [1913 Webster]