(褌?, ふんどし) Popular until World war II, Samurai warriors wore them as underwear. Now worn as swimwear or sported during various occasions like the Hadaka Matsuri were thousands of men would gather at the Saidaiji Temple in Okayama for the naked festival. It is also worn by sumo wrestlers.
Deuces via GIPHY Basically means goodbye. This is based on displaying the two finger peace sign when leaving. Deuces = peace, I'm out. Depending on the tone it could mean to "fuck off." Chris Brown chucking deuces was a declaration of, "GTFOH!"