Present participle of firk; the act of driving out, expelling, or moving something quickly.
From 'firk' (verb) with present participle suffix '-ing' (from Old English '-ung'). Describes the ongoing or continuous action of firking.
'Firking' appears in Shakespeare's works as a colorful action verb, and it's one reason Renaissance English feels so energetic compared to modern English—writers chose verbs that sounded as vigorous as the action they described.
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