Source : Webster's Revised Unabridged Dictionary (1913)

Drawl \Drawl\, v. t. [imp. & p. p. {Drawled}; p. pr. & vb. n.
   {Drawling}.] [Prob. fr. draw: cf. D. dralen to linger, tarry,
   Icel. dralla to loiter. See {Draw}, and cf. {Draggle}.]
   To utter in a slow, lengthened tone.

Drawl \Drawl\, v. i.
   To speak with slow and lingering utterance, from laziness,
   lack of spirit, affectation, etc.

         Theologians and moralists . . . talk mostly in a
         drawling and dreaming way about it.      --Landor.

Drawl \Drawl\, n.
   A lengthened, slow monotonous utterance.

Source : WordNet®

drawl
     n : a slow speech pattern with prolonged vowels
     v : lengthen and slow down or draw out; "drawl one's vowels"