An Australian $10 note. Blue: because of it's blue colour, and Swimmer: because of the watery theme layed down with the AU$20 note Lobster
Cobber 1: "Hey mate, i'm short a coupla bucks, you got a fiver spare?"
Cobber 2: "Nah mate, i've only got a blue swimmer"
by Capt_Bat June 14, 2010
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