noun; something that is wearing, annoying, angering, or just a general pain in the ass. Can be applied to events, people, etc.
Origin: Xenia, Ohio
1. "Dude my Girlfriend is maken me go to the ballet this weekend." "Thats an Ass dagger"
2. "Hey man, I'm not trying to be an ass dagger, but you owe me 10 bucks."
3. "Damn, this job is a freaken ass dagger."