( Riddle ) I"m All Used Up?!

Question:

When I'm used, I'm worthless, In desperation always expressed, the intended not protected. (What am I?) Ten responses will reveal the answer. :-)

Additional Details

3 weeks ago
Two guesses. Come on folks, any guess is better then no guess. 9 more and the answer revealed.

3 weeks ago
Jenx, Getting warm. :-)

3 weeks ago
Answer: A poor alibi or excuse.

Answers:

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