en dents de scie

== French == === Etymology === Literally, “in sawtooth [fashion]”. === Pronunciation === IPA(key): /ɑ̃ dɑ̃ d(ə) si/ === Adjective === en dents de scie (invariable) jagged, serrated (figuratively) uneven, chequered, inconsistent un parcours en dents de scie ― a switchback, a roller-coaster career des performances en dents de scie ― (please add an English translation of this usage example) des résultats en dents de scie ― (please add an English translation of this usage example)