slithery

That slithers; that moves like a snake.

Do you feel a creeping, shrinking sensation, Watson, when you stand before the serpents in the Zoo, and see the slithery, gliding, venomous creatures, with their deadly eyes and wicked, flattened faces? Well, that’s how Milverton impresses me.

[…] we set out for the cannery. There, men with spiked poles would swarm into the scow, hook each fish under the gills. The creatures would hurtle through the air like silver streaks, landing into the cannery chutes with slithery thumps, and pass on to the ripping knives

Sneaky, underhanded; insincere.

The suspects include mischievous caricatures from the New York art world-a guileful art dealer, a slithery lawyer, a glittering female collector of celebrities, a vacant former model who is Maitland's widow, and so on.

Slippery, causing one to slither.

But a little while only would he suffer us to halt; then right we turned, up along the ridge, where the way was yet worse than in the dale had been, with rocks and pits hidden in the heather, and slithery slabs of granite.

She led the way, stepping gingerly on the slithery moss.