a piss in the Mississippi - so small it doesn’t even matter, like trying to fix a leak w

so small it doesn’t even matter, like trying to fix a leak with a pencil.

He gave a penny to a beggar who had a $100 bill. That’s a piss in the Mississippi.

She added one second to a 10-hour meeting. It was a piss in the Mississippi.

He used a grain of sugar in a whole cake. That was a piss in the Mississippi.