The phrase "packing em in" typically means to fill a space or crowd with people, usually for an event or performance. Antonyms for this phrase may include "emptying out," "spreading out," "dispersing," or "thinning out." These words suggest movements that oppose packing or filling, such as vacating a space, extending and separating people or objects, or reducing a crowd's size. For example, instead of packing a conference hall with attendees, one speaker may encourage attendees to spread out across multiple rooms or disperse outside for better networking opportunities. In this way, antonyms for "packing em in" emphasize creating space and distance rather than crowding and constriction.