I know what you mean...
You think you're being clever, but you’re just shouting 'I know what you mean' at everything like it's your favorite song.
Your friend says they're sad. You yell, 'I know what you mean!' like you're at a concert.
They say they're hungry. You say, 'I know what you mean!' and then eat three burgers.
They talk about how hard life is. You say, 'I know what you mean!' even though you just finished your homework.