To fix problems; to correct or repair.
After they argued, it fell to me to talk to her and try to mop up.
To win a competition decisively.
To get rid of (enemies) within a certain area.
To clean up an area destroyed by a natural disaster or by violent activity.
To pitch the final innings especially of a game that is no longer close.
To consume or get rid of an excess of something.
To finish something off; to apply a finishing touch
To clean up (liquid) with a mop, rag, sponge, or other cleaning device.
To absorb the leftovers of a dish with bread etc., in order to eat them.
To emphasize or underscore; to make something even better or worse.