slag it up


Senior Member
This is a section from Robbie Williams book Reveal which I'm translating.
I wonder what slag it up means? I'm pretty sure that it has got something to do with dirty talking. In this part she is going to an audition for the role of a prostutute.

Soon Ayda heads out, encouraging words from her husband – ‘Hey, slag it up one time’ – fresh in her ears.
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