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3. pin (one's) heart to (one's) sleeve

pin (one's) heart to (one's) sleeve

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pin (one's) heart to (one's) sleeve

To openly display or make known one's emotions or sentiments. I knew Josh had a crush on me because he always pins his heart to his sleeve. Growing up with a father who never showed any emotion, I made a point of always pinning my heart to my sleeve.

See also: heart, pin, sleeve