Self-A-Werewolf

Self-Aware.
A Werewolf.
Self-A-Werewolf.

Someone who really knows what's going on every time there's a full moon.

Lunar.
Nerd.
Lunerd.

FY I oughtta!

FYI.
Why I oughtta!
FY I oughtta!

For your information, I am angry.

Irate.
Data.
Irata.