What is the definition of Mainly Engineering?

"Mainly engineering, huh? That's like saying a comedian is mainly an actor because they're all set in a chair and perform for an audience of 'laughing engineers'—people who think they're part of the action but are just waiting for the mic.

---

Edgy example sentence: "The new CEO of 'Mainly Engineering' announced that the company would soon be hiring more engineers for the 'ainly' unscheduled shift change, promising that it's 'ainly' about fixing the Wi-Fi and not really about actual engineering work."