gafmenot
You say this when someone's trying to get you to care about something, but you're just too full of yourself to even think about it. It's like the most arrogant version of 'no thanks.'
'You're going to get a tattoo?' 'Gafmenot. I'm too cool for that.'
'You're going to ask me to help you?' 'Gafmenot. I'm too busy being cool.'
'You're going to tell me my life is a mess?' 'Gafmenot. I'm the mess, you're the problem.'