In a Q+A session held at Facebook's central station in Menlo Park, California, the 31-year-old said the catch would be a route for individuals to express compassion.
He said Facebook was "close" to having it prepared for client testing.
An "abhorrence" catch has been continually asked for by a few clients since the now's presentation notable "like" catch in 2009.
"Individuals have gotten some information about the "abhorrence" catch for a long time," Mr Zuckerberg told the gathering of people on Tuesday.
"Most likely many individuals have gotten some information about this, and today is an extraordinary day in light of the fact that today is the day that I really get the chance to say we are taking a shot at it, and are near delivery a test of it."
Then again he went ahead to say he didn't need it to be a system with which individuals could "down vote" others' posts.
Rather, it will be for times when clicking "like" on "miserable" posts felt coldhearted.
Prof Andrea Forte, a specialist in social and participatory media at Drexel University in Philadelphia, said clients won't all of a sudden turn on one another's posts.
In an email, she thought of: "They may utilize an abhorrence catch to express some negative feelings (like disappointment with advertisements appearing in their sustains) yet I question it will make them begin wantonly hating photos of their companions' infants, puppies, felines and cooking analyses. "I think it will for the most part be utilized to express mellow dissatisfaction, or to express solidarity when somebody posts around a negative occasion like a passing or a misfortune."