Spare at the spigot and spill at the bung phrase
To care about trivial matters and not worry about more significant ones
My mom thinks that this old fridge still works well and doesn't need to spend a lot of money on a new one, but she ignores the fact that it consumes a huge amount of electricity to operate. This is like sparing at the spigot and spilling at the bung.
My dad always spares at the spigot and spills at the bung.
I know the reason why her living expenses are high is sparing at the spigot and spilling at the bung.
save as much money as possible
Used to say that someone attempts to get money from you.
It's mostly used in the present tense.
If someone has a cast iron stomach, they have a strong stomach that can digest unusual food and even bad food without being ill.
Jimmy must have a cast-iron stomach, when he drank milk with lime juice and felt perfectly fine afterward.