Someone who is ALWAYS on an online social networking or chat community site, they know everyone and all their business
God damn you're always here! do you ever sleep you fucking chat rat?
by endlessnameless February 3, 2010
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1. v. To save the content of an instant messaging chat and forward it to management, betraying a co-worker.

2. n. One who betrays a co-worker thus.
Hey, where you going with your stuff?

Home. I was flirting with Shawna in Messenger and HR got hold of it.

Did she chat rat you?

Yep. She's a total chat rat.
by Cranky Neighbor July 21, 2010
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Stuck in a poisonous mental prison of jealousy and self-doubt that blinds them to their own potential. People who spend all day in Facebook forums hating and conspiring more hate.
People who spend all day creeping for information on Facebook are known also as chat rats.
by Ontopofthegame November 11, 2013
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