Keep it up, Mandrake, he said. Just keep it up. You may be the Prime Minister's blue-eyed boy now, but how long's that going to last if you don't deliver?.
a character in a nursery rhyme (=an old song or poem for young children) . He is a young boy who is dressed in blue and goes to sleep instead of taking care of the cows and sheep. The rhyme goes: Little Boy Blue, come blow your horn,/The sheep's in the meadow, the cow's in the corn;/But where is the boy that looks after the sheep?/He's under a haycock, fast asleep
disapproval Someone's blue-eyed boy is a young man who they like better than anyone else and who therefore receives better treatment than other people. He was the media's blue-eyed boy. = darling, favourite. the man or boy in a group who is most liked and approved of by someone in authority