(n.)a pre-determined location - decided upon among friends - that signifies where to meet after an event has ended: a party, club, church, movie, date, work, etc., etc.
circa 1998, Talahassee, FL
"Cuz, You fitna hit tha moon?"
"Naw, but I'll be to the let-out!"
I was at the let-out when cuz got mopped last night.