To send email from another user's account, notifying the world that this person has broken computer security policy by walking away from their computer and left it unlocked.
"Erin must have gotten sheeped! I just got an email from her saying she loved sheep and wanted to find some sailors to share them with!!"
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.