"Your honor as a Lannister is worth less than this." She kicked over the waste pail. – ACoK, Catelyn VII

Because Jaime remembers.

[Jaime] remembered the pail Lady Catelyn had kicked over in his cell. A strange woman, to trust her girls to a man with shit for honor. – ASoS, Jaime I

Jaime definitely remembers.

Urswyck spread his hands. "What Timeon means to say is that the Brave Companions are no longer in the hire of House Lannister. We now serve Lord Bolton, and the King in the North." Jaime gave him a cold, contemptuous smile. "And men say I have shit for honor?” – ASoS, Jaime III

Not that it bothers him or anything.

"Why is it that no one names Robert oathbreaker? He tore the realm apart, yet I am the one with shit for honor.” – ASoS, Jaime V

He probably means that generally, and not just because of the one time Cat kicked a bucket over-

Jaime stood. "I am tired of having highborn women kicking pails of shit at me, Father." – ASoS, Jaime VII

(Love how he says that like it wasn't a thing that happened literally once, while he was an enemy captive, talking to a woman whose children (plural) he had tried to kill. I know, I know, it's the spirit of the thing.)

New book, new Jaime, hahahaha just kidding, AFFC Jaime's still brooding about Cat and her refuse pail.

Give me leave to pick my own men, and the Kingsguard will be great again. Put that baldly, though, it sounded feeble; an empty boast from a man the realm called Kingslayer. A man with shit for honor. Jaime let it go. – AFFC, Jaime II

Jaime Lannister, king of letting things go. Clearly.

He's so good at letting things go that he's still thinking about the pail when he goes to Riverrun.

"Do you wish to resume your captivity? Your old cell is still available. We have put fresh rushes on the floor." And a nice new pail for me to shit in, I don't doubt. – AFFC, Jaime VI

Never change, Jaime.

He could feel the eyes on him; the Tully men upon their battlements, the Freys across the river. If they are not blind, they'll all know he threw my offer in my teeth. He would need to storm the castle. Well, what's one more broken vow to the Kingslayer? Just more shit in the bucket. – AFFC, Jaime VI

jasper you don’t get to get away with this that easily.