thick as thieves
Intimate, closely allied, as in The sisters-in-law are thick as thieves. This term uses thick in the sense of “intimate,” a usage that is obsolete except in this simile. [Early 1800s]
thick girlsRead more in this article about some frequently asked questions and fun facts related to our definitions.
shivRead more in this article about some frequently asked questions and fun facts related to our definitions.
devoted, familiar, dear, related, thick, private, loving, attached, chummy, confidential, inseparable, palsy-walsy, buddy-buddy
- thick and fast,
- thick and thin,
- thick client,
- thick milk,
- thick register,
- thick skin,
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.