what's the meaning of the following?

[john3_10]

He's in crust

[Charlie Bernstein]

He's in crust

!? Nothing.

Can you give us more context?

[john3_10]

i think that it is he is in a curse but i heard it wrong

[Charlie Bernstein]

i think that it is he is in a curse but i heard it wrong

Oh. Maybe:

He is cursed.

Does that make sense?

[susiedqq]

He is toast!!

Is that what you mean?

[john3_10]

perhaps,but what do you mean by he's toast

[susiedqq]

It's an idiom to say that another person is "finished" i.e. "lost all sympathy with me" or "he's going to get it."

It usually describes exasperation on the part of the speaker.

Example:

"My brother took my car again. I have warned him many times. This time, he's toast."

What is YOUR context?
It would have saved much time if you would have explained your question with examples of use.

[Torrance88]

A strange idiom so it seems. How can someone be toast? As in, roasted by a dragon's breath, dating back to the old English folk tales.

He's toast indicates a more playful degree of 'being finished', usually not meaning that the person is actually in any physical danger. He's fallen into an argument and is certain to suffer the consequences.