solid as a rock
Also found in: Wikipedia.
(as) solid as a rock
Exceptionally stable, sturdy, and reliable. They've been married for 50 years, so their relationship has to be solid as a rock. That table must be as solid as a rock to withstand the ceiling collapse with hardly a scratch.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
*solid as a rock
Cliché very solid; dependable. (*Also: as ~.) Jean has been lifting weights every day, and her arm muscles are solid as a rock. This company has always built power tools that are as solid as a rock.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
(as) solid as a ˈrockextremely solid and reliable: The Irish team were solid as a rock in defence. ▶ ˌrock-ˈsolid adj.: The company has a rock-solid reputation.
Farlex Partner Idioms Dictionary © Farlex 2017