v. App. meaningless: see context of quot. 1599, of which the phrase in 1611 is prob. an echo.

1

1599.  Shaks., Hen. V., IV. iv. 29. Boy. He sayes his Name is M. Fer. Pist. M. Fer: Ile fer him, and firke him, and ferret him.

2

1611.  Barrey, Ram Alley, II. i.

        I … could haue ferd and ferkt y’away a wench,
As soone as eare a man a liue.

3