Shimmy Shamma Share definition Flag 1) The act of jiggling a clip on a bench back and forth just so, so that it may be able to come free. 2) Jason's mom. "Jason your a fag, Shimmy Shamma" Shimmy Shamma by Cawk August 21, 2003 0 0 Get merch Get the Shimmy Shamma mug. Buy Now — $32.95 See more merch