From The Collaborative International Dictionary of English v.0.48: Chack \Chack\ (ch[a^]k), v. i. To toss up the head frequently, as a horse to avoid the restraint of the bridle. [1913 Webster]
Chack \Chack\ (ch[a^]k), v. i. To toss up the head frequently, as a horse to avoid the restraint of the bridle. [1913 Webster]
