Game or gameness is a genetic trait most often attributed to dogs, fighting dogs and working terriers and fighting cocks that are selectively bred. Dogs displaying this trait can also be described as persevering, ready and willing, full of fight, spirited, or plucky.
The term "game" or "gameness" refers to a genetic characteristic found in dogs bred for fighting, such as terriers and working terriers, and fighting cocks.  This trait is often associated with tenacity, determination, eagerness to fight, spirit, or courage.