Kaitoa (ii), a. Expressing satisfaction or complacency at any event, especially at misfortune happening to others. It is good, it serves one right, etc. Kaitoa kia araia mai koe e te waipuke, kia rokohanga mai ai e au.— Kaitoa kia mate, nau i rere mua (M. 179).
whakakaitoa. 1. v.t. Express one's satisfaction at anything.
2. a. Vengeful. Ka tupu te ngakau whakakaitoa a Ruatapu (W. iii, 14).
Williams Dictionary