Someone who was born and raised in the English capital city that is London. More than not, often associated with people hailing from more central and well known areas such as Wesminster, it does often include people from the West, East, North and South suburbs though.
If you are a cockney, you are a Londoner, but if you are a Londoner, you do not have to be a cockney.
Person 1: "Are you a Londoner?"
Person 2: "I live in Ealing, so yeah I am. Are you?"
Person 1: "I live on the outskirts, techinally in Hertfordshire but I would say I'm a Londoner."
Being extremely under the intoxication of alchohol; sloshed.
(Background: comes from Landon from "The Real World: Philadelphia", a kid who loves his booze)
Dude, M.J. and I got so landoned last night; I called my boss that I'm dating and said all this weird crap to her.