ass opened

A colloquial expression is used to describe a situation where one undergoes a series of challenging, often convoluted tasks or experiences before arriving at a solution or conclusion. It encapsulates the essence of navigating through complex, sometimes thrilling scenarios, where the path to resolution is anything but straightforward.
The idiom is typically employed to convey the intensity and the rollercoaster of emotions involved in tackling tasks that are as demanding as they are exhilarating. It's often used among friends or colleagues to acknowledge the hard work, creativity, and persistence required in such situations.

Related Phrases:
"Like threading a needle in a hurricane" - emphasizes the difficulty and precision needed in chaotic situations.
"Riding the rollercoaster of task/project" - highlights the ups and downs experienced during a challenging process.
Synonyms: Herculean task, wild goose chase, labyrinthine journey, epic adventure.

Note: This idiom is often used in a light-hearted manner, reflecting a sense of camaraderie and shared struggle in the face of complex challenges. It's a badge of honor among those who've 'been through the wringer' and come out triumphant.

The calculations in the business case were very complex and not straightforward. My ass opened until I figured out the math behind them.