Almostlike a prenuptial agreement, but involving alcohol. When someone comes to a party and the host makes them "sign and agreement" which states the host is not liable for any damages inflicted upon the party-goer or the hosts property while the party-goer is under the influence.
"Hey! Nice party!"
"Thanks, dude. But after last time, when you trashed my place and broke your arm, I need you to sign a wine-up before you come in."
When some resigns or retires from a job, they are on "eternity leave". This can also refer to someone who has passed away, especially someone who worked somewhere for a long time, retired/resigned, then passed away later.
Oh I'm sorry, you didn't know that Kelly is on eternity leave? She resigned and moved to Hawaii!
With regrets I would like to inform you that my boss is officially on eternity leave. I will never see or hear them again. Ever.