synonymous with over working. Someone who extends way too much effort for their job/work. In sports when someone plays over the top hard defense when down 50 or chases after every loose ball even though the game is over. In everyday life is when a low waged worker asks hundreds of questions and tries to overcharge and harass customers. In video gaming when a gamer works ridiculously hard on one task (like they mad dog trying to kill one specific player and disregard other tasks)
The McDonald's employee was mad dogging when he launched a small scale investigation of whether water was in my water cup.
Ryan was guilty of mad dogging when he obsessively hunted his brother in Battlefront.
Wallace was mad dogging on defense despite his team losing by over twenty points with his hard and dirty fouls