be out of (one's) shell(redirected from been out of their shell)
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.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.