The idea is that your base material, be it moon dust or just plain dirt, is almost always right under your feet, wherever you are.

Dirty toilets, busted light bulbs and just plain dirt are its hallmarks.

No telling what form it would have, except that a load of plain dirt and rocks was ruled out.

Destroyable terrain can also be colored more than simply plain dirt.

Director Miller commented "I never shot so much plain brown dirt in my life."

Down a plain dirt track (but smooth, and bordered with carefully tended hedges) was another log building.

Assuming that the disk itself is not at fault, these symptoms are in all likelihood manifestations of plain dirt.

Plants grow in many different places - from plain old dirt to richly fertilized soil.

And what could be blocking it is just plain dirt.

He appeared years older, his face marred by pain, fear, blood, and plain dirt, but there was no doubting the accuracy of her identification.