Flag (flăg), v. i. [imp. & p. p.Flagged (flăgd); p. pr. & vb. n.Flagging (–gĭng).] [Cf. Icel. flaka to droop, hang loosely. Cf. Flacker, Flag an ensign.] 1. To hang loose without stiffness; to bend down, as flexible bodies; to be loose, yielding, limp.
As loose it flagged around the mast. T. Moore.
2. To droop; to grow spiritless; to lose vigor; to languish; as, the spirits flag; the strength flags.
The pleasures of the town begin to flag. Swift.
Syn. — To droop; decline; fail; languish; pine.