Eccentric use in place of "Bling Bling". Usually said by caucasian males of age 18-22.
Caucasian #1 : "Haha, dude - you totally owned that guy!!"
Caucasian #2 : "Bo bo bo!"
by R! May 27, 2003
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Ban on site
you are now banned from that site...
usually a forum
There have been over 3 banned usernames traced to your eMail and IP addresses, several were banned for pornography. This means you are now banned from PbN on all accounts (Ban on sight or BOS).
by mreggroll May 10, 2007
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A Bo is the biggest and baddest motha fucka ever. Complete bad ass. A Bo is always with the hottest girls and is a chick magnet. A Bo is a beast, period.
by Swager18 September 26, 2011
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An abbreviation for Bitch Owning Shawty. Refers to a beautiful sexy woman that dominates one of more guys.
He will do anything Niranjana tells him do do because she is his BOS.
by H-Town Pup July 21, 2010
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Shortened term for Beautiful One. Used when someone thinks that they are the best thing that hit town since sliced bread. Is never a positive term. Can be used when talking about the person in front of them, they will not have any idea that you are talking about them.
OMG, BO is such a dumb ho. I cannot believe that she slept with 50 people last week!
by exAshifter August 27, 2009
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This is one crazy dude, who has skin and bones, but he is pretty athletic.
by Gigaplayer May 9, 2018
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Meaning 'Boyfriend-over-Shoulder' :
1.When you are texting someone and your boyfriend is being cheeky so you tell them 'BOS' to warn them, usually signifying that you are talking about something you don'twant your boyfriend to see, or he's doing something to distract you (kissing you everywhere; doing anything he can to lure your attention away) from conversing.

2.Can also mean when a boyfriend is completely nonchalant about public displays of affection (usually right in front of people; mostly a term for posessive/insistent boyfriends because it's their way of showing affection, trying to gain more of your attention and constantly let you know they are there).

3.When someone's in a mood and you're trying to do important stuff, but there he is at your neck and ear, wandering hands- The works. Basically urging you to reciprocate.
'Sorry, can't talk.'
'BOS?'
'very.'

While we were talking to her, he had a huge case of BOS the whole entire time- It was really adorable.

Well, there goes any chance of trying to finish my assignments with him BOSing like that.
by BoredWolf.LonelySheep August 20, 2013
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