A sarcastic expression of
frustration or displeasure at someone/thing.
More
literal definition: I have
no thanks for you because you aren't doing what I want or did something I didn't want.
Example 1:
*toothless, the dragon, flies wildly, terrifying the girl
Hiccup's with*
"Thanks for nothing you
useless reptile" (How to Train Your Dragon)
Example 2:
"You were supposed to bring
hotdog buns! Thanks for nothing."