I kno dass riight!
When you're too full of yourself to even listen to what people are saying.
He talked for ten minutes and you said 'I kno dass riight!' like you were the only one who mattered.
She gave you a gift and you said 'I kno dass riight!' like you already knew it was coming.
He said something cool and you said 'I kno dass riight!' like you thought of it first.