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13.
CI
An IM acronym for "Cubical Intrusion." It lets the other person you're chatting with know that you've been interrupted by someone walking into your cube or personal space at work.
Me: Did you ever talk to Rob? I heard he's thinking of giving his notice on Monday

Maria: CI

Sorry, I'm back. It was that d-bag
John. He's been bugging me all
morning.
by M.&M. December 04, 2008
8 47
 
1.
CI
Confidential Informant; Any individual under the direction of a police officer who furnishes information about criminal activity with or without compensation; works under direction of the department; different from other concerned citizens or complainants not working under department direction and not party to the investigation itself.
My CI places you and your homies at the Quickie Mart last night when the shootings occured.
by inane5 February 12, 2005
359 38
 
2.
per the criminal justice system, C.I. is an acronym for criminal informant
"I'm gonna tell all the guys I know that you're a C.I. and a rat, and I know a lot of people." - Casey Affleck (Gone Baby Gone, 2007)
by zoeking March 06, 2010
25 4
 
3.
c i
a slang term meaning ciggarrette used in street sub-vernacular native to the placer county area; more specifically, lincoln and roseville, CA

common pronounciations:
1.see-i
2.see-i-eeeee
1.bitch, you owe me a pack of c i's for running a train on ma hoe.

2.I bet you two c i's bitch let me supaman dat ass.
by spennyG November 14, 2007
10 9
 
4.
C'i
A contraction between the two words, can and I, used when one is too lazy to say them separately, thus slurring the two together.

Similar to other contractions such as I'm (I am), wouldn't (would not), and they're (they are).

Other spellings include: kai, chi, ky, k'i.
Person 1: C'i have some of that sandwhich?

Person 2: Yeah dude, here's a neeblé (see Neeblé)

Student: C'i please take a nap?

AP Statistics Teacher: Only after you learn about Chi-Squared.

Person 1: C'i get yo digits?
Person 2: Bitch, please.
by scoobgnarbler5 January 07, 2010
2 2
 
5.
Short for cigarette.
"Yo Dave, can my friend Aman bum a C.I., he's all out"
by Padin Alexander August 31, 2006
10 19
 
6.
CI
CI is the acronym for Christian Identity. It has been proven that men who practice Christian Identity are ass clowns and basically creepy.
No, I'm talking about the other guy, the one who is a creepy CI.
by poptartgurl June 26, 2011
17 41
 
7.
CI
Abreviation for the television show Law & Order Criminal Intent staring Vincent D’Onofrio and Kathryn Erbe.
Kathryn Erbe plays the sarcastic detective, Alex Eames on CI.
by bensonfey February 06, 2005
30 63