be brothers/sisters under the skin

be (all) brothers/sisters under the skin

Of two or more people, to have thoughts or feelings in common, despite other obvious differences between them. As much as you dislike your chatty new co-worker, she's as nervous and insecure as you are—you're really sisters under the skin.See also: brother, sister, skin

be (all) brothers/sisters under the ˈskin

be men/women with similar feelings, in spite of outside appearances, position, etc: Actors and politicians are brothers under the skin. They both need public approval.See also: brother, sister, skin