slipped under the radar

Went completely undetected

Slipped under the radar means went unnoticed or escaped attention, from the military sense of aircraft flying low enough to avoid radar detection.

Something that slips under the radar avoids scrutiny, whether intentionally or by chance: The bill slipped under the radar and passed without debate.

Her early work slipped under the radar until she became famous.

Related

kept quiet · evaded · obscure · hidden gem · forgotten · low-profile · below the fold · passed over · clandestine · surreptitious · bypassed · neglected · inconspicuous · understated · unobserved · out of sight · off the grid · disregarded

Opposites
detection/notice

slipped under the radarflagged

Marked for attention

spotted · detected · caught · caught red-handed · noticed

visibility/prominence

slipped under the radarfront and center

Prominent central position

in the spotlight · center of attention · in plain sight · out in the open · conspicuous

intentional concealment vs. exposure

slipped under the radarbroadcast

Transmitted media signal

publicized · made known · paraded · flaunted · trumpeted

Family

slipped, slipping, slipper, slippers, slippery, under, undergo, undergoing, underwent

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G