Rex 

A man whose penis is less then 3 cm

Rex no REAL girl wants to be with you.

Rex by Pepe.96 September 17, 2019

Rex 

A very greedy, selfish brat. He is a hypocrite and likes to beg for money. He makes up excuses for why he does not have money. He always wants you to buy stuff for him or asks you how much you have every day. He is a sad person with no life.

Some kid keeps asking me how much money I have!
It was probably Rex.

Rex by A9172 October 14, 2019

Rex 

Amazing, kind and thought-full. Is a night friend, but can be quite salty if you are mean to him

Person: Rex is so nice isn't he
Person2: Yes, he is...

Rex by swdefrgthzjuiklopö December 10, 2019

Rex 

Rex annoying stupid dog name. Mother

despises him. Small penis and is most likely gay. Has no talent or skill of any kind

Did you see Rex he is such a retarded fag.
You are such a stupid Rex

Rex by FazeCool January 16, 2020

Rex 

It Latin for king.
Also the name given to a handsome boy born around September, October, and November.
Also a popular name for a dog.

That dogs name is Rex.

That handsome man must be a Rex.

Rex by Mr Analyzer May 21, 2020

Rex 

An musical god that everyone looks up to in every aspect of life.

Damn that guy, Kenny? Rocks the guitar just like Rex

Rex by Pfffftobviouslynotvidura October 16, 2020

Rex 

Someone who is very mad, very crossed at times and will push things till the end.

You: Please tell me what's up!
Amy Schumer: S-stay away from me!
You: R-rex???

Rex by RuiTheQt January 22, 2021