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Bromothymol blue is a chemical that turns green or yellow when exposed to high levels of carbon dioxide. It’s chemical composition is C27H28Br2O5S
β€œWe used BTB in class today to measure the release of CO2 in burning ethanol”
BTB by Woofle_124 May 5, 2023
Related Words
BTB btbt BTBF BTBH BTBAS btbg BTBO BTBP BTB "Bite the butt" bTb founder

BTB "Bite the butt" 

when you are about to have sex with a female, flip her over and lightly bite the bare butt. they love it, its a fact
girls love it when you BTB "bite the butt"

bTb founder 

The best youtuba known to man πŸ‘¨πŸΏ. He has a pet monkey πŸ’ with tinfoil for a brian. He is very nice πŸ‘ was the chicken and I wanna I got home 🏑 and nearly diesel fell into my box πŸ“¦ of peas. I washed my eyes with soap so I could hear better. My friends could not come over because I’m deaf so I listened to music to feel it.
bTb founder by bTb Founder December 29, 2020

big tit betty (BTB) 

A name for a female who has extremely large breasts, or in some cases can be joked around using a guy as the argument.
Guy1: That group of chicks from IONA are a bunch of big tit bettys (BTB's). I wouldn't mind titty fucking one of them.
Guy2: Yer, no shit.

Guy1: I saw this porn the other night, this chick had massive tits.
Guy2: Yet another big tit betty (BTB) making it big in the porn industry.
Guy1: Huh? Shut up.

Guy1: During PE that guy Crockster took off his shirt and damn, he is one massive BTB.
Guy2: Gross dude.
big tit betty (BTB) by Mummas September 21, 2005

abdalla btb 

a fucking legend, noone in the world can compare to him. the journy from windsor to the nba!! ig: abdallaiismael_
i want to be a legen , ill have to go the abdalla btb route
abdalla btb by abdalla btb November 25, 2020

Godfather BTB

Someone who is The Godfather of big time bitches aka BTBs
Lebron James is The Godfather BTB because of his move to Miami and other bitchassness
Godfather BTB by GANJEWINXI January 7, 2021