Colloquial term for someone who is obsessed with work, often to the detriment of other aspects of life. Can be used self-deprecatingly or critically.
He's a total workaholic; he works even on his days off.
I make sure to value my hobby time so I don't become a workaholic.
More formal loanword equivalent; 仕事バカ is more colloquial and carries a stronger negative or self-deprecating nuance.
Means 'hard worker' with a positive connotation, unlike 仕事バカ which implies excessive, unhealthy devotion to work.
Common colloquial spelling using katakana バカ for emphasis.
Kanji spelling; less common but still seen.
Compound of 仕事 (work) and バカ (fool). The exact origin is uncertain, but it likely emerged as a colloquial expression to describe someone foolishly devoted to work.