The Collaborative International Dictionary
Gybing
Gybe \Gybe\, v. t. & i. [imp. & p. p. Gybed (j[imac]bd); p. pr. & vb. n. Gybing.] [See Jibe.] (Naut.) To shift from one side of a vessel to the other; -- said of the boom of a fore-and-aft sail when the vessel is steered off the wind until the sail fills on the opposite side. [Also jibe.]
Wiktionary
gybing
vb. (present participle of gybe English)