int. Obs. exc. dial. (yocks). A hunting cry; also as vb. (Cf. YOICKS.)
1778. Garrick, in Monthly Rev. (1779), LX. 59. Squire Western, reeling, with October mellow, Tall, yo!Boys!YoaxCriticks! hunt the fellow!
1828. Sporting Mag. (N.S.), XXII. 129. He yoaksed in a whisper, he cheered in a whisper.
1905. Eng. Dial. Dict., Yocks, a call of encouragement to a dog hunting rabbits, &c. n. Yks.