I'd love to attend your day outing to the hot springs, but I'm afraid I have a dogbligation to my large, anxious great dane. She simply can't abide the kennel for overly-long stays.
Man, you're such a noobligation, you can't even spell 'amazing' correctly.
Person: Did you see THAT noobligation? Every day he comes into the lunch room thinking he's gonna get some food, and every day they tell him he still doesn't have any lunch money.