From Barney Bunch wiki
Stinktooth, but he was a T.Rex instead of a Giganotosaurus. For the rest of the film he called him either T.Rex or Not Stinktooth because he thought he didn't deserve to be called Stinktooth. Not Stinktooth is the love child of The Sharptooth from The Land Before Time and Sebastian the Crab. Just like his cousin Stinktooth, Not Stinktooth likes to eat lots of rotten smelling stuff like rotting flesh, shit, gargabe, and sewage water.