go half/halves / go fifty-fifty
share the bill
keep up with the Joneses
the pressure to maintain the same lifestyle as neighbours or friends
to be knee-high to a grasshopper
to be very young
fifty-fifty
When people split the costs
fall short
For example, when you are trying to reach a certain goal , but you fail to do so
it's six of one and half a dozen of the other
two equivalent choices
to line their own pockets
to enrich themselves
a tidy sum
a lot of money
a drop in the ocean
something very small (not enough to solve a problem)
It's as broad as it's long
a very difficult problem or task
lock , stock and barrel
to sell entirely