also: ムチャぶり
noun
unreasonable request; asking for something unreasonable
Colloquial noun for a demand or task that is clearly excessive, unfair, or impossible to fulfill. Often used when someone is put on the spot with an absurd request.
上司に無茶ぶりされて、週末も仕事することになった。
My boss made an unreasonable request, so I ended up working over the weekend too.
そんな無茶ぶり、できるわけないよ。
There's no way I can do such an unreasonable thing.
Compound of 無茶 (much, 'absurd, unreasonable') and 振り (buri, nominalized form of 振る 'to assign, to throw'). The exact origin is uncertain, but it likely emerged in casual speech to describe the act of throwing an unreasonable task at someone.