The word "yickier" is a slang term that means something unpleasant or disgusting. While it may be a popular term among certain groups, there are many alternative synonyms that can be used to describe the same feeling. Some examples include repulsive, nauseating, gross, revolting, and disgusting. Each of these words has its own unique connotation and can be used interchangeably to describe something that is distasteful or unappealing. It is important to choose the appropriate synonym based on the context in which it is being used, as different words can have different degrees of intensity and impact on the listener or reader.