| 100% | UMM | 3 | “I’m not sure . . .” |
| 100% | SOMETHINGSWRONG | 15 | ''I'm not sure'' |
| 97% | QUITE | 5 | "I'm not ___ sure" |
| 94% | UMM | 3 | Hesitant "I'm not sure..." |
| 91% | FARGO | 5 | "I'm not sure that I agree with you 100% on your police work there, Lou" film |
| 89% | TODO | 4 | "I'm not sure what ___ about this": 2 wds. |
| 89% | HIDEME | 6 | "Make sure I'm not seen!" |
| 89% | HMM | 3 | "I'm not so sure ..." |
| 86% | HMM | 3 | "I'm not so sure about this ..." |
| 86% | UHH | 3 | "I'm not so sure about that ..." |
| 85% | ORA | 3 | "I'm not sure if it's a blessing ___ curse": 2 wds. |
| 83% | IDK | 3 | Texter's "I'm not too sure" letters |
| 82% | TACT | 4 | Saying "I'm not sure that dress looks perfect on you," e.g. |
| 79% | LOCKEDCAR | 9 | I sure hope they're not there! |
| 77% | ITSANUDEEH | 10 | "Um, okay.... Not sure you needed to show me that pic." |
| 76% | HYDRAPHOBIA | 11 | Irrational fear of nine-headed serpents? (although I'm not sure about the "irrational" part) |
| 75% | RENTAL | 6 | I'm not buying it! |
| 74% | PEI | 3 | I.M. not sent through AOL? |
| 74% | CHARMED | 7 | "___, I'm sure" |
| 73% | YAO | 3 | Ming who does not make vases, as far as I know |
| 73% | SIZES | 5 | L and M, but not I, V, or C |
| 72% | DONTMINDME | 10 | “Pretend I’m not here” |
| 71% | MAD | 3 | "I'm not ___, I'm just disappointed" |
| 69% | FROGINMYTHROAT | 14 | Why I'm not singing today |
| 69% | MOI | 3 | "Surely I'm not to blame?" |
| 69% | NOSERIOUSLY | 11 | "Really, I'm not kidding!" |
| 68% | LIE | 3 | "I'm not gonna ___ ..." ("Believe me when I say ...") |
| 68% | ADOCTOR | 7 | "I'm not ___, but I play one on TV" |
| 68% | OVER | 4 | "I'm not ___ it yet" ("It still bothers me") |
| 68% | USED | 4 | "I'm not as young as I ___ to be" |