Yerker

[f. YERK v. + -ER¹.] a. One who yerks; a kicker; a flogger. b. ‘A sudden and very severe blow’ (Jam. 1825).

1664.  Gouldman, Dict., I. (1669), A yerker out, sternax.

1678.  Littleton, Eng.-Lat. Dict., A yerker or whipster, plagosus Orbilius.