megaton bomb (noun)

1. In the science fiction novel, the protagonist infiltrates the enemy base and disarms the megaton bomb just moments before it detonates.

2. According to the mythology of ancient civilizations, the megaton bomb was believed to hold the power to destroy entire planets.

3. In the fantastical realm of dragons and wizards, a megaton bomb was hidden away in a secret underground chamber, guarded by magical creatures.

4. In the cartoon series, the heroic character races against time to stop the villain who plans to unleash a devastating megaton bomb on the city.