A rather strange sexual encounter with a blonde woman, in which she first gives a male partner a blumpkin, allows him to jizz in her hair, and then proceeds to wipe his ass with her luscious golden locks. She then disseminates the revolting combination of excrement and semen in her hair with a brush or comb, and puts her hair up into a bun (hence cinnamon roll). This practice is experiencing staggering increases in popularity, particularly in California.
Did you hear about that new thing, the California Cinnamon Roll? I want to try it with my girlfriend, but she'd have to bleach her hair.