collect dust

beat the dust

To perform curvets too precipitately or too low.

bite the dust

To die.

bust the dust

To clean dust off something, such as with a vacuum cleaner.

catch dust

To be rarely used.

collect one's thoughts

To become mentally composed, especially after being distressed, surprised, or disoriented; to become calm or organized in one's emotional state or thinking, as in preparation for a conversation, speech, decision, etc.

dust mouse

A dust bunny.

dust off a batter

for a pitcher to throw a pitch at or near the batter, typically to frighten the batter or to have him stand farther away from home plate.

dust settles

A heated, angry, or confused atmosphere calms down.