stands for Holy White Otter Tape Trashers; a more intenseway of saying what; a term used for shocking or suprising moments, or to describe a moment or person.
HWOTT? No he didn't!
What a holy white otter tape trasher!
HWOTT!? Thats INSANE!
HWOTT!? That was shocking!
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