1. resembling or having the qualities of cardboard; stiff, flat, or lacking texture or depth
Usage: informal; often used to describe taste, texture, or appearance

Examples

• The pizza crust was dry and cardboardy after sitting out all night.
• The set design looked cardboardy and unconvincing under the bright stage lights.
• Her acting felt cardboardy, lacking any genuine emotion or depth.
• The cardboardy texture of the cheap cereal made it unpleasant to eat.
• The hotel room had cardboardy walls that seemed paper-thin.
• The dialogue in the film was cardboardy and predictable.