Then he smeared every inch of his skin with the foul-smelling black gunk that was supposed to prevent electrical burns.

Researchers burned their hands taking samples of the acidic black gunk oozing from drainpipes along the banks.

The black gunk at the corners of them seems to twitch, however, as if it is somehow sentient.

As the water zaps the black gunk, it briefly returns to its original hues - mint green, strawberry pink, banana yellow.

"Now I've got black gunk all over me!"

She wiped black gunk off my arms and chest.

The thick black gunk on the floor squelched loudly under his feet and made the going treacherous.

They stamped their boots on the ground, trying to shake off the worst of the thick black gunk they'd been treading through, but were only partially successful.

"You'll seize up and die if you get some of that black gunk in you."

Cleaning up the old walls was rejected, because experts determined that the solidified black gunk had turned into a protective coating.