"on the fly" in German on the fly gleichzeitig währenddessen improvisiert Detailed translations for "on the fly" on the fly on the fly(also: concurrent, coeval, simultaneous, simultaneously) gleichzeitig on the fly(also: at the same time, meanwhile) währenddessen on the fly improvisiert{adverb} English synonyms for "on the fly" on the fly {r} hurridly