out of (one's) shell(redirected from out of their shell)
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out of (one's) shell
Less shy, reserved, or reticent and in a more sociable, outgoing, or enthusiastic state. Samantha was quite a quiet girl growing up, but she really started coming out of her shell in college. Jack is actually a very funny, engaging guy once he's out of his shell.
out of one's shell
see under in one's shell.