When we were kids, impending sassiness and a sour look on our faces, often brought this Dadism upon us.

If you’re a non-native English speaker, or young, be advised that “puss” used to mean your face, and can also mean a kitty cat.

Here’s the way a comic artist wipes the look off a puss:

The sharp-eyed might notice another Dadism on the pencil itself. Lead Butt is slang for one who is slow or lazy. The weight of his posterior being the limiting factor of his speed or industriousness.