"The blue stuff has fallen off the door down into the smelter."

The other blue stuff that looks like the water is.

Only a trail of blue sticky stuff all on the gratings.

The blue stuff, whatever it might actually be, now looked like fine fur.

She looked at the pretty bottle of blue stuff that sat on the tray.

"Apparently, there was blue stuff seeping out of my shoes."

The blue stuff on the end was not wood.

Checking the map, that blue stuff to the right is ocean.

"We saved out a thousand bolts of that loose, blue stuff last year," said the heavy woman.

If you won't take the blue stuff, how about some tea?