Question

to come out of your shell - Why don't you come to the party with me? It's time that you came out of your shell.  - As a child she was very shy, but you should have seen her dancing on the tables at the disco last weekend. She's certainly come out of her shell!  - Despite all he has been through Tommy has really come out of his shell in his foster home.  - Tara had reverted to her shy quiet self, it was like she had never come out of her shell.

Accepted Answer

to be more sociable, less timid

Idiom	to come out of your shell
Definition	to be more sociable, less timid
Examples	- Why don't you come to the party with me? It's time that you came out of your shell. - As a child she was very shy, but you should have seen her dancing on the tables at the disco last weekend. She's certainly come out of her shell! - Despite all he has been through Tommy has really come out of his shell in his foster home. - Tara had reverted to her shy quiet self, it was like she had never come out of her shell.

Shell Sociable Timid Party Time Child Shy Dancing