The story
The name is derived from predators in the natural world, who wait for an opportunity to attack their prey near watering holes.
Etymology from Wiktionary, CC BY-SA 4.0.
watering hole attack
Today it means: A computer attack strategy, in which the victim is a particular group (organization, industry, or region), and the attacker guesses or observes which websites the group often uses and infects one or more of them with malware. Full definition →