Interjection. Pronounced "BIHD-wuh-toh". Acronym for "but if you don't want to, that's totally okay." Used to soften a request, in case the person doesn't want to do it.
Ryan: Can you help me cheat on the math final, biydwttto?
Term used to describe a person (focuser) who is cockeyed. One eyeball is focusing on person (focusee), while other eyeball is roaming the scenery. This usually makes focusee rather uncomfortable.
That news guy is a total birdwatcher. Is he looking at camera 1 or camera 2?