household word
Something that has become widely popular or commonly known. Due to the widespread adoption of mobile technology, "smartphone" has become a household word.
a ˌhousehold ˈname/ˈword
a name/word that is extremely well known: The business she founded made her into a household name.Microsoft is a household name.household word
A very familiar saying, person, or thing. Although this term was perhaps originated by Shakespeare, it did not come into common use until the nineteenth century. Occasionally it is used derisively.