The act and process of getting blacked out drunk. Awesomeness required.
Dude: I got wasted last night? Chick: No, honey, you were massively BO'd.
to be very high on marijuana.
I hit some of that Master Kush and was straight Bo'd Out!!!
to get Knocked in the head by a Bird (K-bo'd)
While shooing away pigeons James got K-bo'd