Tom lifted his boot and showed a gray smear on the sole.

'Sorry, little friend,' he said to the grey smear.

The planes are insubstantial too, ghostly gray smears, dream shapes themselves, not likely to make any noise.

The bars were mottled with black and gray smears, and dark tendrils wound through them.

With a grunt, Vimes hunkered down and prodded at a grey smear on the floor.

Bright light shone out of its open airlock, casting a grey smear across the ground.

She had a gray smear on one black sleeve.

The result was a viscous gray smear of mud.

Visibility was unlimited, and the master portal was a vast gray smear on the "horizon."

A grey smear of sound, with six sharp spikes.