Underpack

In spite of its subject, imminent death, Mr. Turturro said: "This was fun. I was curious to see if you could find the right tone for something like that. It was a very elusive thing, because you couldn't underpack it or overpack it. When you're doing it, you can't think about whether or not it's going to be funny, though somewhere in the back of your brain you know it could be."

Source: wiktionary

Instead, empty bags were folded diligently into the corners of underpacked suitcases, waiting to be jammed full with the familiar objects of home.

Source: wiktionary

For those who don't care to have their belongings publicly displayed, the security administration also suggests underpacking, so as to avoid spilling the bag's contents upon opening, and storing personal items in clear plastic bags to allow screeners to see what you have without needing to open toilet kits and the like.

Source: wiktionary

I’m a firm believer in packing at the last moment, because the more you wait, the less you bring — and no one ever complains about underpacking.

Source: wiktionary