v. t. & i. [ imp. & p. p. Jibbed p. pr. & vb. n. Jibbing. ] Also . [ Cf. Jib a sail, Gybe. ] (Chiefly Naut.) To shift, or swing round, as a sail, boom, yard, etc., as in tacking. [ Webster 1913 Suppl. ]

n. A horse that jibs. [ Eng. ] [ 1913 Webster ]