look up any word, like dirty sanchez:
 
2.
A person at work you go to as your favorite person to talk to, eat with, perhaps exercise with, hang out, or even talk dirty through texts or IM's
Friend: Dude is that chick your girlfriend?
Me: Na, it's just my work spouse.
by humphreywhale327 May 12, 2009
 
1.
A significant other you work with, whom you connect, share, and spend time with exclusively and intimately in the workplace. Both parties are mere aquaintances outside of the workplace and are completely unknown to each others true and respective domestic spouses.
"Rumor has it that those two are dating."
"That's completely untrue. Heidi is just Allan's work spouse. That relationship ceases to exist after their 8 hour shift."
by ALSH December 28, 2006
 
3.
A concubine, a sugar daddy, a spouse other than your real wife or husband. Having an affair with the secretary is having an affair with the work spouse.
He left his wife for his work spouse
by elbautista October 24, 2013