A few Belfast comments which I have recently heard concerning people who are mean with money which might raise a laugh.
"As tight as a duck's ar-e "
"He wouldn't spend Christmas"
"He probably still has his confirmation money"

She wouldn't give you the skin of her teeth.

He could peel an Orange in his pocket.

He opened his wallet and moths flew out

He makes every penny a prisoner .

He was so tight he used to squeeze his **** deep down into the cushion so as no one could smell his fart.

he still has a white fiver in his wallet he hasn,t spent yet.