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"
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?