get your cards
get (one's) cards
To be fired from one's job. Primarily heard in UK. After messing up that account, I'm terrified that I'm going to get my cards from my boss.
get your cardsbe dismissed from your employment. British informal
Cards are the national insurance card and other documents relating to an employee that are retained by the employer during the period that the employee works for them. Give someone their cards means ‘make someone redundant’.