plugger
Also known as plugga I guess. A nickname for thongs (the ones that you put on your feet) and seems to be used in Western Australia. They can single- or double-pluggers, single-pluggers being thongs that are reinforced with one set of plugs on the underside of the thongs and double-pluggers being douby reinforced with two plugs
I'm going down to Hay Street Mall today and there's more people wearing single-pluggers than double-pluggers today
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