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1.
When you sit on the toilet, pooping while watching porn on your computer, Talking with people like nothing has changed.
*on aim*

"dude, wanna come over?"

"oh i can't i'm taking a cyber dump"

"oh..."

"I can still talk though. So how about them Broncos?"
by Jbn/Gstache Duo April 24, 2007
 
2.
Getting dumped by your girlfriend over the internet, via e-mail or even worse - instant messengers (e.g. ICQ, MSN, AOL ...). A step worse than being teledumped (see teledump), which is already very very bad.
Fuck me, my girlfriend just dumped me over ICQ. What a kick in the nuts. How low can you go anyway?
by azenka June 14, 2003
 
3.
1. To dump a person;end a relationship over the internet, cyber breakup.

2. When one person ends a "cyber" relationship.
James: What happen with your gf man?
John: The bitch cyber dump me via email.

Tom had to cyber dump her online lover when things started to get creepy.
by Whatupbichez September 18, 2009
 
4.
losing money during an online poker session. typically the dump occurs in less than 30 seconds resulting in a substantial loss of funds.
"i lost 700 dollars in a cyberdump last night when I was drunk. It sucked"
by A wilgus February 17, 2008