Chinese American International School: a smallish, independent bilingual school in SF- specifically the hayes valley. Kids there are smart and rich.
Person 1: where do you go to school?
Person 2: CAIS...it's a blah blah blah (launches into explanation)
Person 1: so is everyone there chinese?
Person 2: no, only half of us.
Person 2: the other half of us are half asian or white people who decide to learn chinese.
Person 1: oh....cool.... so you speak chinese?
Person 2: yeah. (to self: duh)
by xyzpseudonym2 November 2, 2010
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Chinese American International School, a small bilingual school in San Francisco.

People who go there are known as the Rich CAIS Kids.
1. I go to CAIS.
by TOERTELLEHNI November 28, 2010
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A very very shit footballer
They guy over there kicked the ball like a CAI
by Mossco November 16, 2019
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A girl who is so funny and will do anything to make people like her, has a huge rack! Very insecure about her body even if she is tiny.
In love with one boy but he takes her for granted! She is unbelievable talented at singing, and can play more than 2 instruments. She is always trying to change herself so others will like her but she is perfect the way she is.
That girls quite beautiful and cool but so insecure,she must be a cais
by Catedog February 17, 2018
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A cunt
Also has a very tiny penis
Girl 1: I had sex with this guy last night, but he had a tiny penis

Girl 2: Ah, must be a cai
by Y Geiriadurwr December 10, 2013
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red headed, blue eyed, jerk.
will be your best friend until he finds a girl who's better.
will lie to you then ditch you.
Person A: Hey! Do you want to hang out after school? Just you and me like we used to?
Person B: No. I'm gonna go hang with my girlfriend.
Person A: Wow. Way to be a total Cays.
by 5283h8 May 23, 2010
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A "Cai" is someone with an unusually large penis, that likes to flex and express how big it is to their friends and/or family. A typical Cai's penis size is around 13 inches long, while a Kai is about 2 inches erect.
Chad: Hey, guys. Let's organize going swimming this weekend.
Phil: Yeah, sure! I'll invite Jules and Brad.
Chad: Don't invite Jules. He's such a "Cai"
by Bigppwelshman October 29, 2020
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