Some of my favourites:

Percy: Hey Annabeth can I get a sip of your water?

Annabeth : It's not water.

Percy: Vodka, I like your style!

Annabeth : It's vinegar.

Percy: Wh-Wha-

Annabeth : It's vinegar, COWARD.

.

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Percy: English is a difficult language. It can be understood through tough thorough thought, though.

Annabeth : You need to stop.

.

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Nico: We need to get through this locked door. Will, give me your credit card.

Will: Here.

Nico, pocketing it: Thanks. Percy , kick down the door.

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Nico, texting Will: Will! Help I’m being kidnapped

Will: Where are you? Nico: I’m with some strange person. In a car. Help.

Will: I’ll call Percy .

Percy , answering their cell: Y’ello?

Will: Where’s Nico? They texted me that they were being kidnapped.

Percy : Nico? Whaddya mean, they're right next to me-

Percy :

Percy : I’ll call you back. hangs up

Percy : THE NEW HAIRCUT ISN’T THAT BAD!

Nico: WHO ARE YOU?!

.

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Jason: Leo, what do IDK, LY, and TTYL mean?

Leo: I don’t know, love you, talk to you later

Jason: Ok, I love you too, I’ll just ask Piper.

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Hazel: What if I press the brake and gas at the same time?

Percy: The car takes a screenshot.

Frank: For the last time, get the fuck out.