turn upside down

== English == === Alternative forms === turn upside-down === Verb === turn upside down (third-person singular simple present turns upside down, present participle turning upside down, simple past and past participle turned upside down) (transitive, intransitive) To flip over; to rotate top to bottom. Synonyms: flip over, turn over (transitive, idiomatic) To thoroughly examine. (transitive, idiomatic) To alter (something) significantly, often in a negative way. ==== Translations ====