pack out
Verb
Meaning
(transitive, usually used in the passive) To fill with spectators
The stadium was packed out.
(transitive) To bring something (often waste) away when one leaves a natural environment like a campground.
Be sure to bring enough bags to pack out all your trash.
(intransitive, skiing, of snow) To become quite compacted; to become tightly-packed.
Source: en.wiktionary.org