Get A Wriggle On Meaning

(idiomatic) To hurry up.

Example: 1928-29, Jack Lindsay and Percy Reginald Stephensen, The London Aphrodite: a miscellany of poems, stories, and essays by various hands eminent or rebellious, London, The Fanfrolico Press, pg. 218:
  Informed our hostess a thousand times we had to leave early, and do you think she'd get a wriggle on with the tea ?
2008, Darren Walton, "Don't write me off," The Advertiser, January 13, 2008, [1]:
  While accepting he needs to get a wriggle on, Australia's annual great hope remains defiant and insists he can overcome a nightmare draw and once again challenge for the Norman Brookes Challenge Cup.