Used in oil industry contexts, not suitable for casual conversation unless metaphorically. Their company drilled an exploratory well, and it turned out to be a massive gusher.
Pro Tip 2/3
Visual Imagery
Conjures images of sudden wealth or success; think of oil spurting out with force. The new investment turned into a gusher as profits soared unexpectedly.
Pro Tip 3/3
Historical Reference
Relates to historical oil booms; consider the impact of oil discovery in the past. Reading about the Texas oil boom, you'd come across tales of many gushers.