Coosa Queen Share definition Flag Alabama Slang: A boat that people like to party on; derived from the Coosa Queen event rental boat on Logan Martin Lake. Y'all's kids turned the pontoon into a Coosa Queen when y'all were in Biloxi. Coosa Queen by xowe March 31, 2019 0 0 Get merch Get the Coosa Queen mug. Buy Now — $32.95 See more merch