There's lot of definitions for red hat, and is often used without explanation. It's all about context.
Most recently and most frequently it's a reference to Donald Trump's infamous "Make
America Great Again" MAGA red hat.
Ironically on the left wing, red is the traditional color of
communism. The same red beret worn US airborne troopers were also worn by militant socialists or union organizers. Hugo Chávez, president of Venezuela from 1999 until his
death in 2013, was called a red hat.
Pre-World War II, pacifists and union organizers were called red hats. The "Red Hat Acoustic
Music Club" celebrates this usage.
Red hat can be used as a reference to the Bloods criminal gang, such as Jay-
Z "What's Free" song.
Red-hats / red caps are malevolent spirits found in the lowlands of
Scotland. Their red hats would frequently
re-dyed in human blood. It's associated with violence and vampirism. It the meaning of AFI's song "Red Hat"
The Linux computer software is called "RedHat" because its creator Marc Ewing wore a red hat.
Jay-
Z "What's Free"
“No redhat, don’t
Michael and Prince me and Ye
They separate you when you got
Michael and Prince’s DNA"
AFI's song "RedHat"
"Can’t remember days, the days we posses, only the day she left.
I see her in the crucifix, my mind begins to slip. My love had fallen right to a T.
Then I close my eyes and the tears begin to run, the nightmare has just begun.
