have something up one's sleeve

I don't know if the rest of the team has something up their sleeves.

I hope he doesn't have anything else up his sleeve.

You see I always believe in having something up one's sleeve.

I knew now that he had something up his sleeve.

We did not have an action plan immediately up our sleeve.

But all the time we had something a little extra up our sleeves.

That's not to say she doesn't have something up her sleeve, though.

In any case, I had another card up my sleeve.

I didn't know the judge had worse than a fine up his sleeve.

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