資料來源 : Webster's Revised Unabridged Dictionary (1913)

Flunk \Flunk\, v. i. [imp. & p. p. {Flunked}; p. pr. & vb. n.
   {Flunking}.] [Cf. {Funk}.]
   To fail, as on a lesson; to back out, as from an undertaking,
   through fear.