Source : Webster's Revised Unabridged Dictionary (1913)

Sidle \Si"dle\, v. t. [imp. & p. p. {Sidled}; p. pr. & vb. n.
   {Sidling}.] [From {Side}.]
   To go or move with one side foremost; to move sidewise; as,
   to sidle through a crowd or narrow opening. --Swift.

         He . . . then sidled close to the astonished girl.
                                                  --Sir W.
                                                  Scott.

Source : WordNet®

sidle
     v 1: move unobtrusively or furtively; "The young man began to
          sidle near the pretty girl sitting on the log"
     2: move sideways [syn: {sashay}]