Casi is a type of gipsy who is always late.
Arab: "Is Casi late?"
Cat: "Oh like Flavian?"
Russian Guy: "Yes"
by Ka$ian069 December 6, 2018
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A girl who intetionally spells her name wrong. Often quiet and does not do homework.
Has great understanding of good music.
See also friend, fun and duct tape.
Kid 1: I just met this chick who's really nice, but spells her name weird and doesn't do her homework.
Kid 2: Why is she being Casi??
by raychel January 7, 2005
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The meaning of the name Casi is Vigilant In War

The origin of the name Casi is Irish

Alternate spellings: Casey,Kasey, Kacie

Also..

A Girl who obsesses over Sesshomaru.
She cant help it because its her lifes purpose.
Girl1: hey look Sesshomaru!
Casi:WHERE!
Girl1:haha just kidding!
Casi: *attacks* (thus proving is Vigilant In War)
by WhAtNoW?!? June 11, 2009
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an acronym for Cutting and other Self-Injury.
i think i'm going to go post about casi on my blog.
by pheesh April 23, 2006
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The beat of a song most often associated with techno.
Dude I went to this club earlier and the music was all like boonsi-casi boonsi-casi"
by I stew September 17, 2007
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When she's so small that the police have to come knock on your door and ask for ID mid-sex, and then the policemen join in, then you uno reverse and tell them the ID was fake so they have to arrest themselves
"I respected Justin Bieber, I let my kids listen to him all the time. But after that Dirty Casie act, he'll never be played in my household again" - Karen
by JohhnySins69lmao April 3, 2020
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If a girl called casie tarn comes up to you just remember that shes a dumbass bitch.
Oh look its casie tarn ,don’t forget shes a dumbass bitch.
by Kfcfordawin October 19, 2020
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