Inverted, so that the top is now at the bottom. / In great disorder.

Inverted; turned so that the top is at the bottom. / In great disorder. / (finance) Owing more money for something than it is worth; having negative equity.

A fruit-based cake that is inverted after cooking.

plural of upside-down cake

(transitive, intransitive) To flip over; to rotate top to bottom. / (transitive, idiomatic) To thoroughly examine.

A fridge-freezer with the freezer in the lower half.

plural of upside down fridge

A long-burning wood fire that burns from the top to the bottom.

plural of upside-down fire

present participle of turn the frown upside down