Spwack was a lightweight robot built by Team LungFish which competed in the final season of BattleBots. It was bow-tie-shaped robot equipped with a small spinning blade taken from a lawnmower. It didn't perform well in competition, losing its first match to Whirl Wep. It was similar in appearance to heavyweight Deathwishbone. The robot was supposed to have a second spinning blade mounted to the bottom of the robot, but it was not finished in time.
The team that built Spwack also built the heavyweight Chomp and the middleweight Mongus.