Idioms and Phrases with pack them in
pack them in
Attract a large audience, as in A big star will always pack them in. This idiom alludes to tightly filling a hall. [c. 1940]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.