When you flex a specific object as yours to an audience of people, in doing so, anyone who obtains the same object as you could be called a copycat or follower, even if they had it before you as long as you flex it first.
“I don’t care if you bought it first you never told anyone about it like I did, therefore I have Flexer’s Right’s you copycat.”
A person who feels they have to outline the obvious or over explain things so they can take credit for 'thinking of it' even when the thing is so obvious that no-one else said it to avoid being patronising.
The boss is such a flexer when she sends emails out explaining things we all know already.
Random: Omg who's wearing those Burberry sunglasses?
Austin: That's Jill Mcdonald the biggest flexer of all time