The venerable National Enquirer and several competitors (strangely enough, now all published by the same company, American Media Inc. If the story is just in the tabloids, we tend to ignore it.
Most often, however, the term is used to refer to the traditional tabloids which are associated with tabloid journalism or the "gutter press", a cynical and sensationalist approach to news stories, celebrities, and their readers.
The most typical, and arguably most objectionable, of the British tabloids are the "red tops", so called because the name of the paper invariably appears in a large bright red banner.
Tabloids date to the early 1900s when they were referred to as "small newspapers" containing condensed stories easily consumed by everyday readers.
Tabloid readers traditionally came from the lower working classes, but that has changed somewhat in the past few decades.