be out of (one's) shell

(redirected from been out of their shells)

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