In some parts of the UK can be used to describe something, usually a food, as nice. It can also be used to describe cars, clothes and looks.
Jaffa Cakes are boom!
That Ferrari is boom!
Cerys is looking so boom tonight!
by floob April 26, 2015
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Let's talk about the word boom. First of all, the word boom is mainly used for a bomb or and explosion. This word is often not used in real life, but in cartoons or children's book. This could also be linked to the word "kaboom", as they mainly have the same meaning. Therefore boom may mean other things very rarely, but usually means a bomb going off, a gun shot, a volcano erupting, etc.
by Aamori April 4, 2019
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“ yea I’m lowkey tryna boom shorty but she be playin wit niggas”
by Sggino April 1, 2020
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And her exam went boom, as the paper had nephlane in it.
by DEVANKey #♡Keyper♡ May 25, 2019
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A person that in every way, shape and form is better than you and everyone you know and the second you lay eyes on him you’ll just question your existence because he is in every way better than you and will always be.
by UrDadaLmao August 29, 2021
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A person that in every way, shape and form is better than you and everyone you know and the second you lay eyes on him you’ll just question your existence because he is in every way better than you and will always be.
by UrDadaLmao August 29, 2021
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Verb:
To do something like a boomer because you don't care about subsequent generations or the planet.
Person 1:
Hey, did you see that old man toss trash out of his truc?

Person 2:
Yeah, boomers gonna boom, because fuck the planet, right?
by JohnnySmacks January 6, 2023
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