The song was released as the third single from SWV's album, following the top-ten success of "I'm So into You". "Weak" hit number one on the U.S. Billboard Hot 100 in July 1993 for two weeks, and is one of SWV's biggest hits. It also topped the Hot R&B Singles chart for two weeks. Teen singer JoJocovered "Weak" in 2004 on her self-titled debut album.
At seven, "Weak" set a record for the fewest number of characters needed to make up a title and artist's name on an American number-one single.