Refers to somebody or an activity that requires dexterity and is entertaining, impressive, or somehow aesthetic and serves no purpose beyond that. They are often minor or random. Acts like hand games, percussion games, pen twirling, coin rolling, and water bottle passing games count as extra dexterous. Acts like acrobatics or juggling are not extra dexterous, because they are not minor, but in fact major sports recognized worldwide.
1. Jane is really extra dexterous since she can play such complicated hand games.