split up

make like a banana and split

To leave, depart.

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.

split the breeze

To take up space, causing any breeze to move on either side.

split the difference

To choose an option or take a position roughly midway between two opposed alternatives; to compromise.