It may not meet the dictionary definition but I've considered moonlighting working an extra job, without necessarily telling your boss, but outside of regular work hours.
Overemployed i see used in the context of working multiple jobs during the same work hours and just not telling any of your bosses you're working 2-3 other jobs.
That's how i distinguish them anyway 🤷♂️
Did you hear about how the tech industry had a mass layoff last week? .... of 1 guy.
Relevant lockpicking lawyer video
Tap for spoiler
His wife cuts it open from the bottom