idiom · informal
thick as thieves
UK/θɪk æz θiːvz/US/θɪk æz θivz/thick·as·THIEVES
very close friends who share secrets or spend a lot of time together
Examples
“Those two are thick as thieves; they do everything together.”
“Since childhood they've been thick as thieves.”
“The siblings are thick as thieves despite their age gap.”
Band 8 sentence
“Despite their different personalities, the two colleagues are thick as thieves and always support each other at work.”
Collocations
- be thick as thieves with someone
- be thick as thieves since childhood
Word family
Common mistakes
They are thick with each other.→They are thick as thieves.
They are thick like thieves.→They are thick as thieves.
Say it for a higher band
5very close friends→6close friends→7+thick as thieves
Synonyms
very close
Easily confused
close friends
“They've been close friends since they met at university.”
Related words
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In Relationships
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