be as good as gold

be as good as gold

1. To be obedient and well-behaved. Sure, I'll baby-sit Cindy's kids tonight—they're as good as gold every time I watch them.
2. To be authentic and legitimate. According to the curator, this painting is as good as gold.
See also: gold, good
Farlex Dictionary of Idioms.
See also:
  • as good as gold
  • good as gold
  • good as gold, as
  • (as) good as gold
  • in the hope that
  • in (high) hopes that
  • in the hope
  • in the hope of
  • in the hope of something
  • a handful