patchwork quilt

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun literally A decorative quilt made of pieces of cloth having diverse sizes, colors, and shapes, sewn together either to form a regular pattern or in a deliberately mismatched fashion without a pattern.
• noun figuratively, by extension Something having a haphazard or disorganized structure; something composed of seemingly random parts.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a quilt made by sewing patches of different materials together