Game of Thrones, Season 2

Cersei Lannister:
Lord Janos Slynt was Commander of the City Watch. You had no right to exile him-!

Tyrion Lannister:
I have every right! I am the King's Hand!

Cersei Lannister:
You're serving as the King's Hand until Father gets here. I am the Queen Regent!

Tyrion Lannister:
Listen to me, Queen Regent, you're losing the people. Do you hear me?!

Cersei Lannister:
[sneers] The people? You think I care?!

Tyrion Lannister:
You might find it difficult to rule over millions who want you dead. Half this city will starve when winter comes, the other half will plot to overthrow you...and your gold-plated thugs just gave them their rallying cry; "The Queen slaughters babies!" [Cersei remains silent] You don't even have the decency to deny it! [realises] It wasn't you who gave the order, was it? Joffrey didn't even tell you? [Another uncomfortable pause] Did he tell you? I imagine that would be even worse.

Cersei Lannister:
He did what needed to be done! You want to be Hand of the King?! You want to rule?! This is what ruling is; lying on a bed of weeds, ripping them out by the root, one by one, before they strangle you in your sleep!

Tyrion Lannister:
I'm no king, but I think there's more to ruling than that.

Cersei Lannister:
[furious] I DON'T CARE WHAT YOU THINK! You've never taken it seriously; you haven't, Jaime hasn't. It's all fallen on me.

Tyrion Lannister:
As has Jaime repeatedly, according to Stannis Baratheon. [A pause, and then Cersei giggles]

Cersei Lannister:
You're funny. You've always been funny...but none of your jokes will ever match the first one, will they? Do you remember, back when you ripped my mother open on your way out of her and she bled to death?

Tyrion Lannister:
[angry and hurt] She was my mother too.

Cersei Lannister:
Mother gone, for the sake of you. There's no bigger joke in the world than that.