Diamonds cut diamonds.

Diamonds cut diamonds.

A precious pair of brothers [i.e., rascals].

A precious pair of brothers [i.e., rascals].

To say that which is instructive and also pleasing.

To say that which is instructive and also pleasing.

This is a pretty flimflam.

This is a pretty flimflam.

As clear as a whistle.

As clear as a whistle.

Something given that way.

Something given that way.

Leap out of the frying pan into the fire.

Leap out of the frying pan into the fire.

To give importance to trifling matters.

To give importance to trifling matters.

By all that's good and glorious.

By all that's good and glorious.