Slang for the head of your penis. If you remove Darth Vader's helmet, then you are masturbating. If you find a place to put Darth Vader's helmet then you are having sex regularly.
- So what did you get up to last night then Steve?
- I removed Darth's Helmet
- Oh. So you were on your own then.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi