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When you sign on to some sort of Instant messenger/chat and you get attacked by several people at once that all want to talk to you at the same time. Usually occurs on dating sites when "leg-humpers" (overly-annoying guys that start chats with boring small talk or "what's up", "hey" or "hello there"). They aren't very patient people either. They assume they're the only one you're chatting with.
Example of IM Gang-Banged:

10:12 sign-on
10:13 lonelyguyinNY: "Hey what's up?"
10:13 scarysingleguy: "Hi there. Wanna chat?"
10:13 psychostalker1985: "Hi I'm John"
10:13 desperateandugly02: "Hey there beautiful..."
10:13 younganddumbkid: "You're hot"
10:14 sign-off
by HondaLvrLori August 02, 2010
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