bashtag

1. (Internet) A hashtag used to criticize something, especially one that was intended for promotional use but repurposed by users to criticize that which it was intended to promote, or make the opposite point.Examples: "The threat of a viral video or Twitter “bashtag” takedown has raised the cost of direct manipulation and greenwash."; "The hashtag became a bashtag and Twitter users were instead using it to share their negative experiences of McDonalds,^([sic]) letting others know about the poor service and bad food they had experienced."; "Unfortunately, while you like your product, others may feel differently. It doesn't take long for a hashtag to become a bashtag."Internet