1.
corporate slave, company drone
A person who works excessively long hours and sacrifices their personal life for their company, often without adequate compensation or recognition. A derogatory and self-deprecating term blending 会社 (company) and 家畜 (livestock).
Usage
A portmanteau of 会社 (company) and 家畜 (livestock), implying that the worker is treated like an animal by their employer. The term emerged in the 1990s and became widespread on the internet and social media. Often used self-deprecatingly by overworked employees.
This is an informal, colloquial term. It would not be used in formal business contexts.