Fist my Bump Share definition Flag A phase repeated by the Eridian alien, Rocky, from the novel turned movie, Project Hail Mary, Rocky's way of saying "Fist bump" Ryland Grace: We did it! We found a cure for the astrophage! Rocky: Fist my bump! Fist my Bump by anonymous April 19, 2026 0 0 Get merch Get the Fist my Bump mug. Buy Now — $32.95 See more merch