A dialectal or archaic term meaning to rub or fidget with something roughly or irritably.
Of uncertain origin, possibly from Low German or Scandinavian roots related to rubbing motions. May be connected to 'fray' or 'fret,' appearing in regional English dialects by the 16th century.
Frab survives in some British dialects as a wonderfully specific word for that annoyed fidgeting you do with your hands when frustrated—it's the kind of word that captures a feeling most languages leave unnamed.
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