how to say this in German?
Stick a fork in me, I'm done.

Steche eine Gabel in mir?

I'm looking for a literal translation and not a translation of the meaning of said saying.

Question

how to say this in German?
Stick a fork in me, I'm done.

Steche eine Gabel in mir?

I'm looking for a literal translation and not a translation of the meaning of said saying.

Answer

It;s idiomatic to English and does not really mean anything in German, 
but if you wanted to translate it, you would have to say

Steck eine Gabel (in mich) rein. Ich glaube, ich bin gar.
(like:   well done - as in cooking)
 But as I said, it does not translate well into German.

You should say:
Mir reicht's! Oder: Ich habe genug!

Answer

Almost.

Steche eine Gabel in mich, ich bin fertig.

Answer

danke everyones for antworts! schoenen guten what ever time of day it is now in euren Länder.