A mass distributed ass hickey, to publicly praise one or more people. Often used in an email with multiple cc's, a mass hickey makes all recipients feel good for the person(s) praised, yet at the same time they feel somewhat violated.
Mango is the king of mass hickeys. That last email he sent out praising Lulu was copied to the entire company. I'm happy for Lulu, but I feel like I just got a major mass hickey.