BSS 

BSS stands for ぼくがさきにすきだったのに / Boku ga Saki ni Suki datta no ni loosely translates to "Even though I loved her first" which is a subgenre of NTR where the main guy and girl aren't officially in relationships such as girlfriend or wife, but the story still evokes feelings of jealously and loss when the main girl ends up with someone else"

Technically, this scenario doesn't even qualify as NTR. The term you're looking for is BSS.

BSS by LowerMyGoddamnTaxes April 9, 2021

Bss 

Bss stands for Bee Swarm Simulator and it is a farming game in Roblox

I like yo play Bss in roblox

Bss by Beekid September 30, 2021

BSS 

Bull Shit Syndrome

God! Perry is such a liar! He totally has BSS!

BSS by James Fredricks March 11, 2010

BSS 

Bowl-Splattering Shit; i.e.: it is a miracle the commode didn't explode.

1. That was the biggest BSS ever. Stay out.

2. The biggest BSS mawfaws are those televangelists.

BSS by djn1010et January 11, 2013

BSS 

Ball sack sandwich

“Dude fight me”
“Shut you ass up and go eat a BSS”

BSS by YaBoiSonOfARis February 6, 2019

bss 

abbreviation for "Bus Station Skank"; an especially derogatory variant of skank.

"Carmen Electra has beautiful eyes but she's BSS."

bss by fenris6644 December 12, 2008

BSS 

BSS (also known as the Brian Schwandt State) occurs when the mind of a human transcends to a 3.14th dimension where the only thought is of the thoughtless. It is at this state where a person can feel that they can draw a total blank; be it a white, black, blue, slightly green, or gore red blank. Only people with practice and time spent intensively meditating can achieve the BSS. Records of people "pulling a BSS" were found dead in various places. On the roof of a really tall building, the side of the Golden Gate Bridge, or even during skiing. Unfortunately, those people were found dead, shortly after "pulling a BSS".

Common symptoms include, but not limited to: Concussions

In other words, BSS surrounds us all, we all just have to find our inner Brians.

Random person talking for 10 minutes about something REAAALLY important

Brian (after 10 minutes, pauses for 5 more): What?

Brian just pulled a BSS

BSS by omss January 26, 2009