(informal) An action that yields undesirable results to its subject.

(idiomatic) A central or major role in a situation; a position in which one is surrounded by or very involved in complex, changing events.

(chiefly UK) Something done habitually or according to social norms, expectations, etc.

plural of poor thing

An Internet-like structure connecting everyday physical objects equipped with RFID or similar tags.

plural of living thing

(idiomatic) late in the day

plural of vision thing

The most important factor; the principle consideration.

(informal) Something that is conventionally accepted as good beyond doubt.