show (some) spine

To demonstrate determination, resolve, and strength of character. If you really think your boss's plan for the project is flawed, you need show spine and go tell him. If you guys want to keep your students from skipping class, you need to show some spine and give them failing grades.

See also: show, spine

See also:

grow a spine
bow to (one's) demands
bow to demands
be in (one's) black books
be in someone's black books
make (one) sore
in (someone's) bad books
in someone's bad books
get (one) where (one) lives
hit where you live

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