mark (one's) card

(redirected from mark my card)

mark (one's) card

To alert one to pertinent information about something or someone; to tip one off. Shortly after I started, one of my coworkers marked my card about the boss's tendency to give very harsh criticism.
See also: card, mark

mark someone's card

give someone information. informal
This idiom, which dates from the mid 20th century, derives from the world of horse racing. The card is a race card , the list of runners at a race meeting, so to mark someone's card is to give them tips for possible winners.
See also: card, mark
References in periodicals archive ?
I would say, 'can we have a cup of tea, and could you just mark my card a bit?
It also helped having Frankie Dettori mark my card as he pulled up after the second race before I started my walk.
I would often phone him to discuss the chances of horses he would be riding, and he would always mark my card.
Kieren and Brett Doyle both have experience of the two Hong Kong tracks, at Happy Valley and Sha Tin, and they have been kind enough to mark my card as to how best I should ride them.