As the nickname is only given to 'tomboy' gingers, I wouldn't be surprised if she throws the first punch in any fight!
After being nicknames a "Rangaasaurous-T-Rex", it is likely that this person will start to go around saying "Rawr, I'm a dinosaur" and other such sayings.
Lyss: "Yeah, didn't you know? She's the new Rangaasaurous-T-Rex in town! You should have figured that out when she was the only girl to actually take shop!"
Mick: "Well, I know I ain't going to go mess with that Rangaasaurous any time soon!"