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3. be out of (one's) shell

be out of (one's) shell

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be out of (one's) shell

To be less shy or reticent and more sociable, outgoing, or enthusiastic. Samantha was quite a quiet girl growing up, but she's really been out of her shell since leaving for college. Jack is actually a very funny, engaging guy once he's out of his shell.

See also: of, out, shell