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 A Duck Walks Into A Bar Birthday Card £3.49 Add to basket Bloody Hell…We’re Always Late For Parties! Birthday Card £3.49 Add to basket Still Got Your Youth Cartoon Style Birthday Card £3.49 Add to basket Happy Birthday Babes Alison Hammond Birthday Card £3.49 Add to basket