i totally already know that
A cocky reply used when someone says something so obvious it's like they're trying to waste your time. It's like saying you knew the punchline before the joke was even told.
'I totally already know that', said to my friend when he told me the same story again.
'I totally already know that', said to my coworker when she told me the same gossip for the third time.
'I totally already know that', said to my dog when he barked at the same mailman again.