slip under the radar

English

Etymology

From military contexts, where aircraft would fly low to avoid being detected by radar.

Pronunciation

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Verb

slip under the radar (third-person singular simple present slips under the radar, present participle slipping under the radar, simple past and past participle slipped under the radar)

1. (idiomatic) To go unnoticed, especially for a long period of time.

Synonyms

• fly under the radar