He's always got something up his sleeve, but you'll never know.

"He's got some sort of plan up his sleeve, you know."

"Apparently, I've got more tricks up my sleeve than you give me credit for."

If I'm not greatly mistaken, he's got something up his sleeve.

He's one of those strong, silent men who have always got something up their sleeve.

"I have a feeling he's got something else up his sleeve to surprise us."

I've got more up my sleeve today than I ever had.

There's simply no way to see it all (unless you've got a couple of spare years up your sleeve).

And it sounds like he's got something new up his sleeve.

But equally I've got something up my sleeve that you don't know about.