fisticuff

fist +‎ cuff (“blow with the hand”). Modern uses as a verb are a back-formation on the plural uses of the noun.

fisticuff (plural fisticuffs)

1. (rare) A fistfight.
   • 1852, Eli Bowen et al., The Pictorial Sketch-book of Pennsylvania:

     Every fifteen or twenty minutes there was a rush to some part, to witness a fisticuff.

2. (obsolete) A cuff or blow administered with the fist.

fisticuff (third-person singular simple present fisticuffs, present participle fisticuffing, simple past and past participle fisticuffed)

1. (chiefly humorous) To engage in a physical fight.
   • 1963, J P Donleavy, A Singular Man, published 1963 (USA), page 265:

     Generously scattering a drop of my fortune on an early morning sea breeze. Should have jumped after it. Grabber at life's banquet follows a fortune to doom. As folk fleece and fisticuff in street.

2. (obsolete) To strike, fight or spar with the fists.
   • 1846, Making of America Project, The American Whig Review:

     Do they fisticuff with thunder-snaggs […]

• fisticuffer

• “fisticuff”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
• “fisticuff”, in Dictionary.com Unabridged, Dictionary.com, LLC, 1995–present.
• Oxford English Dictionary, 2nd ed., 1989.
• Random House Webster's Unabridged Electronic Dictionary, 1987-1996.