Best definition
a being that tries to eat people from the bottom of lakes in the winter. It comes through a secret

hole in all lakes from the ocean when winter comes around and goes from a shark to a giant walrus-like dinosaur when the lake freezes over. The only thing that protects us from it is the ice on the lake. It comes there because of all the fish it can eat. It’s also very intelligent.

If you fall into the ice, the Walurasourus will eat you!

It’s a Walurasourus!