Unoriginal means that something is not very creative or innovative. Sometimes people use the word to describe something that is not very good or enjoyable.
The movie was unoriginal and boring.
The book was unoriginal and didn't have any surprises.
adjective
not original; not being or productive of something fresh and unusual
1
If it is inauthentic, then, it is unoriginal.
2
That is a completely unoriginal point.
3
The text appears to be unoriginal.
4
He's terrible and unoriginal to boot.
5
Second one is not as nice it is unoriginal.
6
There is, an unborn, an unoriginated, an unmade, and an unformed.
7
The whole thing was completely unoriginal.
8
The connection is obvious, unoriginal and uncontroversial.
9
Unoriginal reasearch, if there is such a thing, by an anon.
10
That is just as unoriginal as my replacement section.