Fun Business

Not to confuse with "funny business", Fun Business includes acts, which are considered abnormal, unusual and fun. It does not have to be a bad thing, it's just something, you wouldn't normally do, a crazy action, for example getting a tattoo while being drunk, hooking up with 4 different people a night, swinging on a chandelier, etc.

"Yesterday has been classic Fun Business."
"Oh I know, you just went on stage and started singing in front of alle these people!"