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Similar to SMS whore but in regards to Instant Messaging service such as MSN or Yahoo messenger, IRC channels etc.

Someone with excessive compulsion for using Instant messaging for conversation. Usually registered with all kind of instant messaging services, and they are constanly logged in to those services and first to respond to anyone queries.
Joe lacks confidence speaking on the phone, so he hangs around chat rooms and IRC channels, what an IM whore.
by Dee-Odus January 04, 2009
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