Jostle v. t. : To run against and shake; to push out of the way; to elbow; to hustle; to disturb by crowding; to crowd against.

Jostle v. i. : To push; to crowd; to hustle.

Jostle n. : A conflict by collisions; a crowding or bumping together; interference.

Example:
How do I get my headphones to stay in my Ipod Touch? At the slightest Jostle they come out!!!?

Taxonomy
jostle, Merriam-Webster Online Dictionary, Dictionary, webster, Word Games, collision, close proximity, Webster Online Dictionary with audio pronunciations, objective, thesaurus, glossary, english, language, ESL, Search, tle, jä, Inflected.

Defination from the web:
jostle from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... a : to come in contact or into collision b : to make one's way by pushing and shoving <jostling toward the exit> c : to exist in close proximity ...