To reveal some previously secret part of someone's life, originally from someone coming "out of the closet" as gay.
Valerie Plame was outed by the Bush Administration as a CIA agent.
Joe was outed as an alcholic when his boss saw him leaving an AA meeting.
A date with someone you've met over the internet; it's not quite a blind date because you've seen their photo, chatted with them and possibly talked to them on the phone.
I have a cyclops date tonight at 8. Text me at 8:20 so I have an excuse to bail if it sucks.