1. The bench players are beginning to limber up on the sidelines to be ready to play in the game.2. You should limber up your whole body if you are about to do something intense for more than half an hour.
limber uplimber up = 做暖身運動，讓身體柔軟
An aborigine, as the nam suggests, refers to one of the original or earliest known inhabitants of a country or region.