What is Check Your Puss?
1.
British saying, mainly Scotish.
Puss: face.
Often meaning, look how ugly your face is, or if it's over made-up with make up, or if some is in a bad mood and you want to annoy them and make it worse you say "Check your puss!"
Ned walks in totally caked in make up. Person walks up to her, points and says, "Check your puss!"
See