Formal:
* The king's lackey served him breakfast in bed every morning.
* The corrupt politician surrounded himself with lackeys who would do his bidding.
* She refused to be treated like a lackey by her boss.
Informal:
* My brother's always been a lackey for their dad - he just does whatever he's told.
* Don't be such a lackey! Stand up for what you believe in.
* The company's CEO is surrounded by lackeys who just nod and agree with everything he says.
Figurative:
* The media was accused of being a lackey for the government, only reporting what they were told.
* The once-independent artist became a lackey to the record label, losing their artistic freedom.
Remember: "Lackey" is a derogatory term, implying someone is subservient and without their own opinions. Use it carefully and consider if a different word might be more appropriate depending on the context.