Enjoy!

[mrbill]

I, for one, am fed up with being told, "Enjoy!" by my waitress. This verb isn't both transitive and intransitive: it takes an object.

[Anglika]

Trying to stop its use will be like Knut telling the ocean to stop coming up the beach - a thankless and impossible task!

[NearThere]

I, for one, am fed up with being told, "Enjoy!" by my waitress. This verb isn't both transitive and intransitive: it takes an object.

and how about "Take care"?

there's an awkward moment when you're waiting for the speaker to finish his sentence while he's perplexed by your expectant facial expression wondering if he had said something unintentional.

NT