The phrase "red hat" typically refers to someone who is a leader or expert in a particular field. It originated from the tradition of wearing a red hat to signify authority or knowledge. Full definition
The evaluation was all about getting real - life feedback from potential Red Hat customers rather than relying on the formal personas to decide what to create and distribute. (contentmarketinginstitute.com)
I love how a simple red hat served it's purpose both for fashion and function on a hot day! (thisseasonsgold.com)
I have a lot of experience with Red Hat Linux and other distributions like Centos and... (members.climber.com)