Top Definition
A high class, often formal event, usually with an open bar, where you end up just getting completely wasted. A play on "black tie affair". Not to be confused with Urban Dictionary defined black tie affair.
Hey man, you going to the spring formal? Heard it will be open bar.

For sure bro; it's going to be quite the black out affair.
by prakaru August 03, 2009
7 Words related to black out affair

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