Office fixture?

• Devoted toiler
• Unlikely "TGIF" exclaimer
• Nine-to-niner, e.g
• He sleeps with his briefcase

Wiktionary Word definitions in Wiktionary
a. In the nature or manner of a workaholic. n. A person who feels compelled to work excessively.

WordNet Word definitions in WordNet
n. person with a compulsive need to work

Wikipedia Word definitions in Wikipedia
A Workaholic is someone suffering a from a psychological disorder Workaholic, or variants, may also refer to: Workaholics , a 2011 television comedy series on Comedy Central Workaholic (song) , song by 2 Unlimited

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1968, coined from work (n.) with second element abstracted absurdly from alcoholic . This sets up the old Rodney Dangerfield joke: "My old man was a workaholic: every time he thought about work, he got drunk."

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
noun COLLOCATIONS FROM OTHER ENTRIES a workaholic (= someone who never stops working ) EXAMPLES FROM OTHER ENTRIES ▪ Selling is a career that seems to attract workaholics. ▪ Steve's doing a sixty-hour week at the moment - I never realized he could be such ...