thick as thieves

Sharing every secret

Thick as thieves describes people who are extremely close, sharing secrets and conspiring together like criminals who must trust each other completely.

The phrase emphasizes intimate friendship and loyalty: Those two have been thick as thieves since childhood.

Thick here means closely packed or intimate, not stupid.

Related

two peas in a pod · friendly · confidants · intimate · blood brothers · fast friends · co-conspirators · in cahoots · tight · bond · clandestine · hush-hush · kindred spirits · birds of a feather · chummy · partners · covert · scheming

Categories
Opposites
interpersonal closeness

thick as thievesestranged

Separated by emotional distance

strangers · at odds · complete strangers · perfect strangers · sworn enemies

Family

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Familiarity
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Profile
Used worldwide · Timeless · Positive · Everyday, not technical · Rated G