Top Definition
A slapper from the suburb of Riverstone in the Hawkesbury region in New South Wales, Australia. Can also be a cougar or a scantilly clad woman.
The pub was full of Riverstone Slappers on Saturday night.

Person 1: "Dude do you want to go to the Mean Fiddler?"
Person 2: "Na man its full of Riverstone slappers'
by windzaa September 12, 2012

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