NOUN (1)

1. the sound of casual playing on a musical instrument;
- Example: "he enjoyed hearing the tootles of their horns as the musicians warmed up"


VERB (1)

1. play (a musical instrument) casually;
- Example: "the saxophone player was tootling a sad melody"

The Collaborative International Dictionary of English v.0.48:

Tootle \Too"tle\, v. i. [imp. & p. p. Tootled; p. pr. & vb. n.
   Tootling.] [Freq. of toot.]
   To toot gently, repeatedly, or continuously, on a wind
   instrument, as a flute; also, to make a similar noise by any
   means. "The tootling robin." --John Clare.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

tootle
    n 1: the sound of casual playing on a musical instrument; "he
         enjoyed hearing the tootles of their horns as the musicians
         warmed up"
    v 1: play (a musical instrument) casually; "the saxophone player
         was tootling a sad melody"