When somebody shouts on e-mail or chat sites on the web. Usually (but not always) all in caps and at somebody else.
(Online) Eg 1:
Meg: WOULD YOU IDIOTS STOP TALKING ABOUT THAT STUPID "Jo Bro" CONCERT ALL READY?!?!? IT'S BEEN ALMOST 3 MONTHS!!!!!!!!!!
Katie: NO! It was a-MA-zing!!! And you need to stop e-shoutiong at us.
(Offline) Eg 2:
Matt: I'm so sick of Joe e-shouting at us all about how we lost the game!