1) This meal was the wastiest I've ever seen; so much food was left uneaten.

2) The wastiest idea was to build a new highway through the protected wetlands.

3) The wastiest part of the project was the excessive use of materials.

4) She always buys the wastiest products that end up cluttering her home.

5) The wastiest decision was to buy a car that constantly needs repairs.

6) The wastiest use of time was spent watching mindless television shows.

7) That party was the wastiest event I've ever attended with excessive decorations.

8) The wastiest thing to do during a drought is to water your lawn excessively.

9) He thought it was the wastiest use of money to buy a designer handbag.

10) The wastiest behavior came from the company that continued to pollute the river despite warnings.