Top definition
Friends who often drink so much every time that go out that they do not remember the night's activities. These friends consequently have a solid relationship built off of forgotten yet (hopefully) spectacular memories.
Kellie and Rebecca aren't just best friends, they are blackout besties, they rely on everyone else to remember their nights but this makes their friendship even stronger.
by rrdancer February 14, 2011
Get the mug
Get a Blackout Besties mug for your Uncle Manafort.