be (as) thick as thieves



be (as) thick as thieves

To be very close friends. Anna and Beth are together all the time these days—they're as thick as thieves.
See also: thick, thief

Common Names:

NameGenderPronouncedUsage
Yerushah-Biblical Hebrew
Khshayarsha-Ancient Persian
Chaleb-Biblical Latin, Biblical Greek
Placide-French
Adellaə-DEL-əEnglish
Maura (2)MAWR-əIrish, Scottish, English