Cutty Arm Share definition Flag A term to describe someone who has been drinking booze for so many years that their elbow is bent to the shape of holding a glass and raising it toward their mouth to drink. That Ted Kennedy guy looks pretty rummy and he definitely has the "Cutty Arm." Cutty Arm by Warnhubb June 22, 2008 0 0 Get merch Get the Cutty Arm mug. Buy Now — $32.95 See more merch