asstomouthstronaut Share definition Flag a traveller who explores the ass, then immediately explores the mouth; may or may not be in the space program "That girl moved to England. She says she's an astronaut." "Maybe an asstomouthstronaut..." asstomouthstronaut by huntsvillain June 12, 2009 0 0 Get merch Get the asstomouthstronaut mug. Buy Now — $32.95 See more merch