Some investors believe that 'the worm has turned', and that the economy is getting better.
She finally 'wormed' the truth 'out of' him. [=she finally got him to tell her the truth]
I didn't think that she would go on a date with that 'worm'. [='wretch']
(..) And the wonder has turned true... Amen! All this time I have lived with the fear... of you doing something stupid. We are so small, Apostol. Flies, worms... That's not true! Not true! We are the most beautiful thing in this world. The battery? I don't even want to think about it. This is my leave. (..)1965 Forest of the Hanged