for nothing

adverb4

1. •
   In vain, uselessly, wastefully, or pointlessly.

   • I wrote ten pages of information for nothing. He just chucked it in a drawer without reading it!
2. •
   For free.

   • I got it for nothing. They are giving them away as publicity.
3. •
   For no reason.
4. •
   Without cause or without due cause.

   • A: Then he walked up to me and shoved me. B: What the hell? What for? A: For nothing!
   • A: Then she filed suit against the restaurant. B: What the hell? For what? A: For nothing! Not so much for allegedly being negligent as for having some money that she might shake down!