astronaut cock Share definition Flag One who cannot control when his penis becomes erect and resembles a rocket taking off into space. Taco Terry met us at the strip club and walked around the club with a boner all night long, what an astronaut cock. astronaut cock by Peachez-757-23336 November 29, 2017 0 0 Get merch Get the astronaut cock mug. Buy Now — $32.95 See more merch