gentle as a lamb

(as) gentle as a lamb

Pleasant, caring, and calm. It's taken some time, but our rambunctious son is finally as gentle as a lamb with our cat. Mr. Stewart may seem crotchety, but he's as gentle as a lamb—he's actually helped me carry my groceries many times. I would highly recommend our pediatrician because she's always gentle as a lamb.
See also: gentle, lamb
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

*gentle as a lamb

Cliché [of someone] very gentle. (*Also: as ~.) Don't be afraid of Mr. Schaeffer. He may look fierce, but he's as gentle as a lamb. Lisa was gentle as a lamb when dealing with children.
See also: gentle, lamb
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

gentle as a lamb

If someone is as gentle as a lamb, they are very kind and never become angry or aggressive. Brian was as gentle as a lamb and wouldn't hurt anyone. Verdy was as gentle as a lamb off the field but a raging lion on it.
See also: gentle, lamb
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
See also:
References in periodicals archive ?
But owners Julie and Ray Woods, of Boston, Lincolnshire, say their 19-stone 10lb pet is as gentle as a lamb - even if they admit it's him who takes them for a walk.
Owners Julie and Ray Woods insist the Great Dane and Newfoundland cross, pictured here with their four-year-old grand-daughter Niami Horrocks, is as gentle as a lamb.
But owner Julie Woods, 54, of Boston, Lincs, insists he is "gentle as a lamb".