Noun
a printed or written greeting that is left to indicate that you have visited
a card that is used instead of cash to make telephone calls
a distinguishing characteristic or behavior
Source: WordNetcalling-card
Generally a chef's book is like a calling card or a portfolio to display their personal work. Sally Schneider
Innovation is the calling card of the future. Anna Eshoo
I'm very comfortable as a singer. In fact, I think it's more - I identified my self-esteem, my self more in those ways when I was growing up. I really - it was kind of my calling card as a kid. Katey Sagal
There are stereotypes of what a beautiful woman is. She struggled with that. A certain part of her life she went on that calling card. I certainly know I've come into contact with that. ‘You are too pretty,' I'm told. Sherilyn Fenn
bombs are a terrorist's calling cards Source: Internet
As they leave, Deckard notices a small tin-foil origami unicorn on the floor, a familiar calling card that brings back to him Gaff's final words. Source: Internet