not interesting

• Not in a a state of curiosity or concern about or attention to something.
• Banal
• Drearily commonplace and often predictable; trite
• Unexciting
• Arousing little or no interest or curiosity; boring
• Commonplace
• Having no remarkable features, characteristics, or traits; ordinary.
• Jejune - Not interesting; dull.
• Not something, such as a quality, subject, or activity, that evokes this mental state.
• Unentertaining
• Lacking variety or excitement; dull.
• Humdrum
• Lacking power to evoke interest through overuse or repetition; hackneyed.
• Blah -Worthless nonsense.
• Ho hum - Used to express boredom, weariness, or contempt.
• Monotonous
• Trite
• Uninspiring

And that my friends is what I mean by "not interesting".