Fred and Wilma. Reference is from The Flintstones. So a guy could also be a Barney.

The circle of riders I rode with, these terms were derogatory and demeaning.

Poser was a person dressed to look like they were in full kit (racing outfit to look like they belonged to a club/team).

Fred has multiple meanings and I think all of them have been mentioned. The source of the term "Fred" seems to have multiple sources as well.

If you wish to apply the term to yourself, please use "Wilma".

Happy riding!!