The Collaborative International Dictionary of English v.0.48:

Skedaddle \Ske*dad"dle\, v. i. [imp. & p. p. Skedaddled; p.
   pr. & vb. n. Skedaddling.] [Of uncertain etymology.]
   To betake one's self to flight, as if in a panic; to flee; to
   run away. [Slang, U. S.]
   [1913 Webster]