This study analyzes the relationship between government deficit spending and key macroeconomic variables in Nigeria from 1970 to 2011, finding that deficit spending positively affects GDP, exchange rates, inflation, and money supply, but negatively impacts lending interest rates. The paper highlights the detrimental effects of persistent government deficits on the economy, recommending reduced deficit spending and further research on its broader impacts. The study covers a significant timeframe and aims to provide insights for policymakers to manage fiscal challenges.