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 17, 2015
Get the Boi neck gaiter and mug.
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
Get a Boi mug for your bunkmate Vivek.
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
Get the Boi neck gaiter and mug.
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 21, 2017
Get a Boi mug for your mother-in-law Nathalie.
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 11, 2016
Get the Boi neck gaiter and mug.
Boi is a response for wearing fake shoes or clothes, to answer something trendy and to answer a fail.
Sean:*wearing fake jordans* Wassup Nick
Nick:*stares at the fake jordans*Boi...
Sean:it's real man!

Jake:*comes towards them wearing wet pants and a fake lakers t-shirt*Wassup homies how you doing?
Sean and Nick:BOI!
by Ca$h money! December 14, 2016
Get the Boi neck gaiter and mug.