Portfolio cowboy

A portfolio cowboy is a designer who is focussed on creating work for their own design portfolio above all else.

This mostly involves designers who don't follow appropriate guidelines or business requirements if they feel it limits their design. To be able to acheive the design they want, they push the boundaries of those guidelines, or break them all togther. Their work can look very good, but often doesn't achieve the desired goals of the project and can introduce other problems and/or inconsistencies in an overall design system.

His design completely ignored the client's brief, he's such a portfolio cowboy.