A dirty Freya is a when a guy (or girl) is seduced by a female wearing a short, tight skirt, or very ripped skinny jeans and lingerie for a top. She will then lead him into the bathroom and get off to him drowning in the toilet water, she forced him to swallow.
when two or more 60+ aged men with 4 inch knobs shit in a bucket and have pillowfight with flanels previously in the bucket, this process is often done naked or in provocative clothing , such as kilts and BDSM latex morph suits. The participating person sits in the middle of the battle.
"omg dave yesterday me and tony did a dirty freya js with philip in the middle."