English stiff upper lip

[rebbonk]

On a train from London to Manchester an Australian was berating the Englishman sitting across from him in the compartment.

"You English are too stuffy. You set yourselves apart too much. You think your stiff upper lip makes you above the rest of us. Look at me... I'm ME! I have Italian blood, Greek blood, a little Irish blood, and some Aborigine blood. What do you say to that?"

The Englishman replied,

Spoiler:

"Awfully sporting of your mother, old chap!"