also: ワンパタン
na-adjective, noun which may take the genitive case particle 'no', noun
one-track; repetitive; predictable; stereotyped
Describes something that always follows the same pattern, lacking variety. Often used critically for ideas, behavior, or creative works. Wasei-eigo from English 'one pattern'.
wasei-eigo (Japanese-coined English), from one pattern
His jokes are always the same old thing.
I'm getting tired of my monotonous routine.