The Collaborative International Dictionary of English v.0.48:

Jostle \Jos"tle\, v. t. [imp. & p. p. Jostled; p. pr. & vb. n.
   Jostling.] [A dim. of joust, just, v. See Joust, and cf.
   Justle.] [Written also justle.]
   To run against and shake; to push out of the way; to elbow;
   to hustle; to disturb by crowding; to crowd against. "Bullies
   jostled him." --Macaulay.
   [1913 Webster]

         Systems of movement, physical, intellectual, and moral,
         which are perpetually jostling each other. --I. Taylor.
   [1913 Webster]

WordNet (r) 3.0 (2006):

jostling
    n 1: the act of jostling (forcing your way by pushing) [syn:
         jostle, jostling]