Webster's Revised Unabridged Dictionary · 1913

Firk

Firk , transitive verb

[Compare Old English ferken to proceed, hasten, Anglo-Saxon fercian to bring, assist; perh. akin to faran to go, English fare.]

To beat; to strike; to chastise. [Obsolete]
I'll fer him, and firk him, and ferret him. — Shakespeare

Firk , intransitive verb

To fly out; to turn out; to go off. [Obsolete]
A wench is a rare bait, with which a man
No sooner's taken but he straight firks mad.B.Jonson.

Firk , noun

A freak; trick; quirk. [Obsolete] — Ford