a person's facial expression
Why are you looking at me with such a sour phiz?
adj. describing someone who obviously posts in Something Awful's Pretentious Hipster Irony Zone, often delineated by a combination of hipster and goon fashion such as tight pants and shirts, flannel, thick-rimmed glasses, obscure band tees, boots, messenger bags ponytails, neckbeards and anything else you can think of.
Did you see that dude with the faggy handbag? He's totally PHIZ...
A person's face, or facial expression. Yes, this is actual British slang. It is a shortening of the word "physiognomy."
I punched him in his stupid phiz.
An exclamation of dismay, frustration or displeasure.
Phiz! I stubbed my toe!
Oh phiz, my girlfriend cheated on me.
Someone slashed my tires. That's some bullphiz.