"WCW" is an acronym for "woman crush Wednesday" and is a social media trend. Users post pictures of real or fictional women they admire or think are attractive.
On Facebook, Twitter, Instagram and other social media sites, the acronym WCW is generally used with a hashtag in front of it so that users can easily click on the hashtag link and view other pictures that have the same tag. On Wednesdays, many users post pictures of a celebrity they love or find attractive and attach the hashtag to it. According to International Business Times, WCW is akin to a social media holiday and gives users inspiration for posting.