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.

Creepy Internet Stranger

ci

Also known as the CI stage, it is the state of drunkeness before the drunkee starts throwing up, but after the stage where they are merely tipsy. Short for cheerfully inebriated.

People in the CI stage are very hyper and random, often times a bit horny. They normally remember things that happened in the CI stage the next day, and are semi in control of what they are doing.