An unproportionate amount of food for a small amount of people

A feast for beastly hungry people
Bro 1: Dude, I'm hella tired today I don't want to do anything

Bro 2: Ya dude let's just hang around and have a beast feast

Girl 1: Let's just have a beast feast today

Girl 2: I'll bring the Oreos, Ben & Jerry's, pizza, steak, Coke, chips, muffins, wings, lemon bars, Fruit by the Foots, Twix, Reeses, Snickers, burgers, fries, milkshakes, quesadillas, and mac and cheese
by KawaSawa February 7, 2012
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The act of ruthlessly beating the shit out of a woman and then eating her out
Whats up Jackie? Where you been?

Sorry I'm late, I was beasting and feasting with this girl.
by josnif May 29, 2022
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A Feast Beast is somebody who is quite abnormally large in body mass from eating too much food - normally KFC or Macdonalds.
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