Misery guts: abbreviation of ‘miserable fizzog’ (fizzog meaning ‘face’: see ‘Fizzog’). Often further abbreviated to ‘mis’ or ‘miz’.
Mona was her usual pissed off mizzog self!
Mizzog: define #2
a misery guts
I thought I was the only person on the planet that used this word.. thought it was made up by myself .. obviously not though .
He was a right Happy Harry . >> miserable old git.
Don’t be such a mizzog, join in the fun