false colors

Syrup Cocillana Compound is a nostrum sailing under false colors.

It would seem, he said, from what he could learn, that Tillotson's honorable opponent was sailing under false colors.

To be constantly forced to move under false colors was a bitter thing for Ezra.

If false colors are carried we must find it out because they carry no notice to warn us.

These are mighty captains, and flaunt their false colors in the daily newspapers which come to our firesides.