RFID blocking card sleeve anti theft credit card holder aluminum game card sleeves Credit Card Sleeve: RFID Blocking, Leather, & Secure Options card up sleeve Meaning Definition To have a "card up your sleeve" means to have a secret plan or advantage that you can use when needed, something you're keeping hidden until What does "an ace up your sleeve" mean? Lingoland English English Dictionary Idiom Ace Up One's Sleeve English Stripped Bare Ace in the sleeve businessman in a suit with a card up sleeve backup plan cunning and dexterity vector illustration flat design isolated on white background get a second cardxa Premium