A fucking loser with a giant truck who hangs out at either the tractor supply or local wal-mart after the hours of 9pm. A BO may have one or more giant antennas the size of a basketball hoop COMING OUT OF THEIR HOOD built for landing spaceships or attracting other BO'S or mudbumpers. It is not uncommon for a BO to use words like < fixin, yonder, thurr, >
Heyo D-rock check out those BO'S, they must be FIXIN to go down yonder with their antennas
A classic country boy. Hobbies include cracking open a cold one with the boys, listening to country music, hunting, fishing, and letting as many people as possible know that he has a truck. Most likely owns at least 2 pieces of camo clothing and also like 27 baseball caps.
“Yeah, I went huntin today. Also drank 14 beers. Also got new subs in my truck.” “Dude you are such a bo”
It is like another way of saying "omg". It is a form of shock and excitement and confusion. A word that is said very impulsively in the presence of a crazy and unbelievable situation.
Amanda: Wait did you guys just see that?
Keira: Did he just...
Lindsay: I can't believe he just did that.
All: BO