sag down (verb)

1. As the wizard performed his spell, the power of his magic caused the bridge to sag down.

2. The weight of the heavy ornament on the dress caused the fabric to sag down.

3. In the futuristic city, the anti-gravity buildings started to malfunction and began to sag down.

4. Why did the clown sag down? Because he had too many balloons in his pockets!