決きまりきった

noun-modifying (irregular)

fixed; obvious; commonplace; stereotyped

Describes something that is predetermined, lacking originality, or so typical as to be unremarkable. Often carries a slightly negative nuance of being clichéd or boring.

• 彼かれの答こたえは決きまりきったものだった。

  His answer was a fixed, predictable one.

• 決きまりきった日にち常じょうに飽あきてしまった。

  I got tired of the same old routine.