Bird that won't shut up no matter what you throw at it
The raccoon butt you see disappearing into the drain system outside your apartment. Now you know what lurks beneath.
A cat/ferret mix, of which the only known living example is named Mugwai who lives with me. Not for much longer if she keeps on the way she has been.
Leaf Blower People:
Modern day torturers. They start far too early and even double paned glass doesn't keep them away.
Please submit your own definitions in the comments...