An abbreviation for Without Kids. Typically refers to the circumstance where a parent is free to party. Often used every other weekend to describe single or divorced parents who share custody. Generally, it is only used to refer to people with kids, but the term can also refer to a general state of being without kids.
Should not be confused with wok
“Cathy is taking the kids up to her parents this weekend. So it’s on tonight boys. I’m W.O.K.!”
“She was cool, but I’m only looking to date someone W.O.K.”
“I hope you got in a disco nap. Kelly is W.O.K. tonight so she’ll be cramming in a month’s worth of partying.”