The Collaborative International Dictionary of English v.0.48:
patch up \patch` up"\ n. To mend by patching; to patch; -- also used figuratively; as, to patch up frayed relations bewteen parties. [PJC]WordNet (r) 3.0 (2006):
patch up v 1: mend by putting a patch on; "patch a hole" [syn: patch, patch up] 2: come to terms; "After some discussion we finally made up" [syn: reconcile, patch up, make up, conciliate, settle]