Derived from the chess move, 'Castling' refers to the law of equivalent exchange. When you are 'Castling' you are doing a favor and/or giving something of value to/for another person, with the sole intention that they will then owe you a favor/item sometime in the future.
"I just gave you a Coke, that's called Castling. Law of equivalent exchange, now you owe me a favor in the future. I want you to name your first born after me."
by Xx_Currently_Castling_xX September 23, 2021

by Nevaeh Castles April 4, 2024

The act of fornicating with deep enough penetration to include both testes, then holding it for a brief or extended period of time, usually while ejaculating.
"Bury the castle in my vagina you stud."
"She was wide enough that I could bury the castle with ease!"
"She was wide enough that I could bury the castle with ease!"
by jessymehores July 14, 2021

by SUMFURRYTHING September 16, 2023

Person 1: have you seen the fan page called gbc in the castle
Person 2: no
Person 1: she’s really cool and hot
Person 2: no
Person 1: she’s really cool and hot
by gbc.in.the.castle October 9, 2021

Shortly after ejaculating inside your significant other, and receiving performance related compliments. You shout king of the castle in a Borat voice to celebrate your efforts.
Kieran: *finishes inside his girlfriend*
Girlfriend: wow, that was amazing!
Kieran: ‘King of the castle, King of the castle, I have a chair, I have a chair, laaaa laaaa laaa’
Maja: ‘seriously ? You’re still inside me !’
Girlfriend: wow, that was amazing!
Kieran: ‘King of the castle, King of the castle, I have a chair, I have a chair, laaaa laaaa laaa’
Maja: ‘seriously ? You’re still inside me !’
by PP Castle February 6, 2022

by FBI_WeegeeBoy1243 November 19, 2021
