I have more than enough to eat at home
The most absurd excuse you can think of when you're clearly full and still eating
Friend: 'Why are you eating that muffin at the park?' Me: 'I have more than enough to eat at home!' (but I already ate my whole lunch)
Sister: 'Why are you eating that muffin at 10 PM?' Me: 'I have more than enough to eat at home!' (and I'm still not done)
Mom: 'Why are you eating that muffin again?' Me: 'I have more than enough to eat at home!' (but I'm still eating it)