Where does this definition of as thick as thieves come from?
This entry for as thick as thieves is sourced from GetWord Corpus, one of the dictionaries and corpora merged into Lughet.
Is as thick as thieves a noun, verb, or something else?
In this entry, as thick as thieves is tagged as 2adv..
What is Lughet?
Lughet is a free trilingual dictionary covering nearly five million entries across Uyghur, Chinese, and English, drawn from more than ten source dictionaries and corpora.