Home / Open / Knock Knock! Who’s There? Not You Tomorrow You’re Fired! – Funny Birthday Card Knock Knock! Who’s There? Not You Tomorrow You’re Fired! – Funny Birthday Card£2.99 Card Size: 5” x 7”. Blank Inside. Envelope Included. Send your best wishes with one of these funny birthday cards. 10 in stock Knock Knock! Who's There? Not You Tomorrow You're Fired! - Funny Birthday Card quantity Add to basket Related products Garden Lovers Lawn Slave Birthday Card £3.49 Add to basket Happy Chuffing Birthday! Miserable Dog Birthday Card £3.49 Add to basket Bloody Hell…We’re Always Late For Parties! Birthday Card £3.49 Add to basket Another Birthday…You Can Be Anything You Want To Be Birthday Card £3.49 Add to basket