Def'n #1: When an email gets passed around the office very quickly - usually when it wasn't supposed to.

Def'n #2: The speed with which the fun office rumours or gossip get passed around.
Jay: Our whole department has seen that wicked email you sent to Steve - that's NSFW!
May: Whoa, that was just meant for him. Dangit, it's gone Office Viral...

Sal: Hey, did you hear who Stupid Sexy Flanders is hooking up with?
Hal: Totally, but where have you been - that went Office Viral last week.
by Leafsblowgoats September 30, 2013
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