a small Australian crayfish, of the genus Cherax, inhabiting streams and water holes.
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British Dictionary definitions for yabby
a small freshwater crayfish of the genus Cherax, esp C. destructor
Also called: nipper a marine prawn used as bait
(intr) to go out to catch yabbies
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012