Super Snowman is a snow sculpture. These snow sculptures have appeared at various moments in the series and they have been given names and other attributes. The different types of snowmen that have appeared in the series are:
Monkey D. Luffy built Snowman-san while traveling to Whisky Peak on the Going Merry. It had a body made up of two spheres, arms made of sticks, a barrel for a head, a cape, and sticks for its nose. Usopp damaged it as payback for Luffy damaging his snow sculpture.
Usopp made the snow sculpture of The Snow Queen at the same time when Luffy made Snowman-san. The "Yukidaru Punch" from Snowman-san broke the sculpture's head.
Hyper Snowman-san was an enormous version of Snowman-san that Luffy made in Drum Island's Bighorn town. Sanji destroyed it because he was upset that Luffy and Usopp were having fun during an important time.
Usopp developed the snow monster known as Shirora. Its size was equivalent to Luffy's Hyper Snowman-san and it had the appearance of a dinosaur standing on two legs. Sanji also obliterated it.