High pitched sarcastic insult

Native to North London, it usually shows how someone lacks the ability to do something. It can also be used to purposely indicate that you are stronger than someone.

Matt: "Hey John I'm sick at football."
John: ( High pitched sarcastic insult ) "You're sick at football."

Tom: "I can quickscope better than you."
Joe: ( High pitched sarcastic insult ) "You're better than me."