1. redundant, poorly designed, or unnecessary code, features, or components in software or systems
Usage: informal; computing/technology jargon
2. any unnecessary or unwanted material, object, or thing; junk or clutter
Usage: informal; slang

Examples

• The old software was full of cruft that slowed down the entire system.
• We spent weeks removing cruft from the codebase to improve performance.
• The website accumulated so much cruft over the years that it became difficult to maintain.
• Developers often debate whether a feature is useful or just cruft.
• Cleaning up cruft is an important part of code maintenance.
• The attic was filled with decades of cruft that nobody needed anymore.