split the difference

make a difference

To carry out an action, the result of which is a significant change, or an altered circumstance.

make all the difference

To be a crucial or deciding factor; to have a very significant effect (often a positive one).

make like a banana and split

To leave, depart.

same difference

A distinction which makes no difference; a distinction which does not matter.

split hairs

Tedious details; minutiae.

split on a rock

To completely fail in one's attempt

split one's sides

To laugh hysterically.

split the baby

To resolve a dispute in a way that is disadvantageous to both parties.