Then he slithered and slunk with a smile most unpleasant around the whole room and he took every present.

12 seconds sound clip from the How the Grinch Stole Christmas! (1966) movie soundboard.

You can hear this line at 00:12:59 in the Blu-ray version of the movie.

Quote context

[...]

- This is stop number one.

- The old Grinchy Claus hissed as he climbed to the roof, empty bags in his fist.

- Then he slid down the chimney. A rather tight pinch. But if Santa could do it, then so could the Grinch.

- He got stuck only once, for a minute or two, then he stuck his head out of the fireplace flue where the little Who stockings hung all in a row.

- These stockings...

- He Grinched.

- Are the first things to go.

- Then he slithered and slunk with a smile most unpleasant around the whole room and he took every present.

- Pop guns, pampoonas, pantookas and drums, checkerboards, bizzel-binks, popcorn and plums.

- Then he stuffed them in bags. Then the Grinch, very nimbly stuffed all the bags, one by one, up the chimbly.

- You're a vile one, Mr. Grinch, you have termites in your smile.

- You have all the tender sweetness of a seasick crocodile, Mr. Grinch.

[...]