Idioms and Phrases with smooth as silk
smooth as silk
Lacking impediments or obstacles, unhindered, as in The negotiations went smooth as silk. This simile alludes to the slippery quality of silk. [c. 1900] Also see smooth sailing.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.