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Acronym for Brotherhood of Steel, the main enemy of the Enclave and ally of the Vault Dweller, Chosen One, and the Lone Wanderer
"in the BoS, the scribes develop technology, the knights build it, and the paladins use it."
BoS by Mosin August 4, 2009
Related Words
Blocked
On
Sight

An acronym used to convey which types of people one will immediately block. Usually seen in bios.
Tweet: "Bigots get BOS!!"
BOS by Gay-internet-user October 3, 2022
This is an acronym meaning "blocked on sight" often used similarly to DNI (Do not interact) in twitter/tumblr bios.
Twitter bio: Furry 🦊 Not cute!!! He/him 🏳️ 🌈 GAY🏳️ 🌈 dating ❤️partner's @ here❤️ Sometimes I draw. ZOOPHILES & HOMOPHOBES BOS!!!
BOS by Gay-internet-user February 11, 2023
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).
BOS by mreggroll May 26, 2007
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.
BOS by H-Town Pup July 22, 2010
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.
BOS by BoredWolf.LonelySheep August 20, 2013