overthrow something—
1. turn smth. upside down:
- …there was a boat right above the submarine. The boat was overthrown and nine fishermen drowned.
2. (of a regime, government, etc.) bring about the downfall; remove by force:
- Communism signifies an organized attempt to overthrow the existing social order.
3. (of a law, verdict, etc.) eliminate or invalidate:
- Laws are openly violated, standards of behavior are overthrown.
throw something over—
1. throw smth. across (from one side to another):
- John glanced at the note and threw it over to me.
2. = overthrow something 1:
- The horse took fright, and the carriage was thrown over.
3. abandon or renounce smth.:
- I’ve decided to throw over the lifestyle I’ve been used to.