This is random.
1. lifetime warranty-when it breaks, its lifetime is over and the warranty is expired.
2. blood oath-don't break the oath, or I'll spill your blood (you can probably guess who came up with that one)
3. slumgullion-this is a real word! It's a type of meat stew.
4. catastrophe-"If the English language made any sense, a catastrophe would be an apostrophe with fur."-Doug Larson