Green’s Dictionary of Slang

(Anglo-Irish) in trouble.

1922		Joyce Ulysses 155: His horse’s hoofs clattering after us down Abbey street. Lucky I had the presence of mind to dive into Manning’s or I was souped.
1981		M. Keane Good Behaviour 231: [W]hen I tried to get up I laughed and moaned together at the shocking pain in my ankle. ‘Now we are souped,’ he said.