Waddafak is the "word" you would use if somebody isn't making any sence, or being a complete goof canoe. I dont wanna know what the literal fucking vagina balls that you would use this "word" in. Probably in response of the most fucked updisgusting thing a friend+ might say.
"I will shove an entire gaping hairy yellow moon-sparkling cheese filled slimey constipatedsquirrel penis in your throat."
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