What do you put on a bagel, to make sure nobody steals it?

Roger may or may not be a walrus. However, both roger and a walrus can be me.

I hiss and spit as I hit the ground running, Slipping and sliding, I just can't get my footing back under me I'll continue to scream until you dump water over my head Or throw a bit of flour right into my face- Jeez, and they call me roux

Where dirty water flows. And your naughty thoughts grow.

What’s black, white, and loved by everyone?