This is what you say when someone says/does something stupid.
Usually the hand is extended and is pointing towards the intended person.
Tony: I like hate Englosh class but love reading.
Half the class: Boi. Get on somewhere.
by Your Fake Polo October 18, 2015
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Can Be Used When:
1) When You Hardcore Roast Someone Like He or She is Thanksgiving Dinner.
2) When You Be Trying To Explain Something That Shouldn't Need To Be Explained.
3) OH SHIT WHAT UP!
1) "Fight Me!"
"BOI WHAT DO YOU MEAN 'FIGHT ME?' YOUR ARMS ARE GODDAMN NOODLES AND YOUR NOSE CAN BE BROKEN LIKE UNCOOKED SPAGHETTI".
2) "So I'm Getting Back Together With Emily."
"Boi, She Tried To Snap Your Neck."
3) "DAT BOI!"
"Oh sHiT WhAt uP?"
by TheAngeredGiraffe June 14, 2017
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Boi is a very rare species of frog found only in the north coastal area or at the Gulf stream. They eat bees, flies, and sometimes birds. They are carnivores and, instead of using their legs, they ride a one cycle bike for transportation. They are light green with small, black eyes. They can also speak some of the human language!
" Oh, shet! Here come dat boi! " the young British man said. " Oh shet waddup! " said the Boi frog.
by Shh bby don't u cri™ May 30, 2016
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A saying when someone does or says something stuipd.
Guy 1:"Hey, isn't Donald Trump the president of China"

Guy2: "BOI!!"
by Maddy_like_bruh January 22, 2017
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When you hear this word, know that it is a word of challange for dominance in a social circle. It is the initiation word for a bout of roasting.
".......BOI"
Oh my, it seems as if Brian is about to roast a fool."
by Mr Jag July 12, 2016
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(Most of the time this term is used incorrectly as a fashionable way to spell "boy". The actual (true) definition is associated with LGBT and Bdsm communities.)

Boi (plural: bois) is slang within LGBT and butch and femme communities for a person's sexual or gender identities.
Boi may also refer to someone assigned female at birth, who generally does not identify as, or only partially identifies as feminine, female, a girl, or a woman. Some bois are trans or intersex people.9 Some "bois" identify as one or more of these, but they almost always identify as lesbians, dykes, or queer. Many trans bois are also genderqueer/nonbinary (in itself a trans/transgender group), or might identify as cis persons or trans men, and yet practice genderfuck in which they do not fit in either masculine or feminine binary gender presentation.

(BDSM, especially in roleplay) A male bottom (i.e. submissive partner), defined not by junior age, but by his obedient role, especially when that implies him being subject to spanking and/or other punishment by the dominant "top".
Daddy likes his Boi to be submissive.
by wrxtasy514 May 28, 2019
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