Capable of and ready for any kind of mischief.

With plenty of effort, speed, etc.

(hyperbolic) Anything at all.

(idiomatic) There are no rules or restrictions.

(idiomatic) Very little; not a lot.

Asks if someone is busy tomorrow, possibly to invite them to do something if they are available. ("Tomorrow" can be replaced by other dates, such as "are you doing anything on the weekend", etc.)

I don't want to buy anything

A phrase, often used jocularly, said upon parting.

Statistics can be manipulated to support any conclusion.

(religion) Beliefs and practices of an anythingarian.