''If you don't get a wiggle on, we'll miss the first act.''
Etymology
In 1891Wilson's Photographic Magazine published "The American Psalm of Life" which began, "Get a wiggle on, my lad, Don't walk at a funeralpace..." By 1919 the phrase was also used in a song, "Get a wiggle on, get a wiggle on, Don't stand there with a giggle-on." By the 1920s the term had found its way into the American language as slang.