lightning fast

come thick and fast

To arrive rapidly in large groups.

fast and furious

Rapid and energetic.

fast asleep

Sleeping, in a deep sleep.

fast sheet

A hotel or similar establishment catering to prostitutes.

fast times

A period of time characterized by quickly-paced activity, especially involving extravagant or risky conduct, sexual behavior, or other exciting events.

go nowhere fast

To fail to make any progress.

hold fast

To stubbornly resist assault, pressure or opposition, either physically or mentally.

lightning in a bottle

That which one seeks in attempting a difficult or challenging feat.