The act of getting verbally abused, crushed or busted via Instant Messenger. Typically emphasized with caps and/or excessive exclamation points.
I dumped her ass on IM and she strung together some wicked hate bombs, it was a complete IMaul.
I was just joshin, no need to IMaul me.
After reading "Go to Hell" for the fifteenth consecutive exchange, I decided I'd had enough of this shit and fired off a vicious IMaul.