A sheep, a ......, and a snake fall off a cliff Baa,dum,tisss

Average everyday. Terrific mail. Terrible frisbee.

In Russia, I hide in my mother, and she hides in her mother and she hides in her mother and she hides in her mother and she hides in her mother. In a fictional pink land, I can be a president, weird, writer, physicist, doctor, lawyer, or judge

I am the antagonist in several movies and series, but in most games you're happy to deal -with- me. I give superheroes a hard time and make kings laugh.

Not me, feeling anxiety when I missed a whole day. Not me, sneaking in a few riddles while working from home. Not me, spending endless nights on my phone. Just one more...