Scenario One..
Person One: Can I have my pen back?
Person Two: What pen?
Person One: The one in your hand.
Person Two: I don't know anything about a pen.
Person One: Stop being a shit.
Person Two: "Your life is shit"
Scenario Two..
Person One: That gig was dissapointing.
Person Two: "Your life is dissapointing"
MISUSE
Can be used incorrectly.
Scenario One..
Person One: I had a sandwich for lunch today.
Person Two: "Your life is a sandwich"
This just
doesn't make sense.
Scenario Two..
Person One: Did you see that flower? It's so beautiful.
Person Two: Your life is beautiful.
Obviously the insult has now become a compliment.