The Flaming Nazi is an intense masturbation technique. It involes a male putting a clamp on their testicals and ejaculating while the clamp is still on causing intense pain and pleasure.
"I did a Flaming Nazi and it hurt bad"
The act of a male removing his feces-stained penis from the anus of a female or another male and painting a swastika on his/her forehead.
Steve: "So did you fuck my ex-girlfriend yet?"
John: "Oh yeah, and I gave her a flaming nazi to boot!"