Irritator - Meaning: Irritator 

Irritator (irr-it-ate-or) is probably a spinosaurid dinosaur related to Spinosaurus. It is thought to have lived in the early Cretaceous period, around 110 million years ago. Current estimations indicate a length of 8 metres (26 feet) and a height of 3 metres (9 feet).

It is known from a nearly complete skull (about 80 cm long) found in Brazil. Irritator challengeri was named by paleontologists Martill, Cruikshank, Frey, Small & Clarke in 1996.

The people who found the snout-less skull added plaster to it in order to make it look it more impressive. This nonsense didn't fool the paleontologists, but it did irritate them, hence the name.

Irritator was a carnivorous dinosaur.