The term "gat wrong" is an informal expression that describes something going awry or not going according to plan. There are many synonyms that can be used to convey the same general meaning. Some options include expressions like "going south," "falling apart," "off the rails," "in disarray," "misfiring," "going haywire," "in shambles," "a mess," and "out of control." These phrases can be used interchangeably with "gat wrong" depending on the context and desired emphasis. Regardless of which phrase is used, they all indicate that something has gone wrong in a significant way.