1. present participle of dummy; creating a mock-up or prototype of something
Usage: technical; design/publishing
2. present participle of dummy; pretending or acting as if one lacks knowledge or ability
Usage: informal

Examples

• The designers are dummying the new website layout before final approval.
• She’s dummying up a prototype of the product packaging.
• The team spent hours dummying different page arrangements.
• He was dummying ignorance about the missing files.
• They’re dummying the book layout with placeholder text.
• Stop dummying and tell us what really happened.