poner verde a sus espaldas

[speedier]

No context I'm afraid - it's from a list of colloquial expressions containing colours.

Does anyone know whether poner verde a sus espaldas = to speak very badly about someone?

Thanks in advance

 

[Henrik Larsson]

Yes

poner verde = to criticize strongly
a sus espaldas = when he/she is not present

 

[speedier]

Thanks a lot Henrik.

 

[Henrik Larsson]

I forgot to say that "poner verde a alguien" is a colloquial expression, used a lot in Spain.