Yeeeuuhhh is defined as an exclamation you scream out when you have reached climax of intercourse. With this word, the pulling of your arm in a flexed movement is often used as well.
"Buster fucked that onechic on a sailboat, and went.."Yeeeuuhhh!"
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