(1). Your top priority or, more often, your only choice.
“I told the IT guys to think of me as their only child when it comes to allocating resources this year.”
(2). The prima donna on your staff who you tend to give all of the plum assignments to just so they will stop bothering you about how they have no “career path”.
“Bob knows I’m an only child when it comes to assigning the top accounts.”
Props to Denise for the submission.