Something that goes beyond being simply badass, it advances to an entirely different level.

An extraordinary feat worthy of the title Boss Hard.

When something is Incomparably awesome.
Jeff: Hey did you see that fight last weekend that Todd got into.

Matt: That was hardly a fight, Todd destroyed him just by blinking

Jeff: Man, Todd is so Boss Hard
by Wesker_Returns December 25, 2012
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Just about the biggest shit a human can take. Taking a big boss hard shit may include actions such as:

Taking off all of your clothes in preparation

Praying to god

Holding on to the toilet seat

Big boss hard is the highest level of shit-ifficulty.
Person one: “do NOT go in the bathroom man, I just took a big boss hard shit”

Person two: “thanks for the heads-up, you probably just saved my life”
by awakaxis December 7, 2022
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