| 100% | DUH | 3 | "I can't believe I missed that!" |
| 99% | DUH | 3 | "I can't believe I missed that question!" |
| 81% | MEANDMYMOUTH | 12 | "I can't believe I said that" |
| 74% | DUH | 3 | "I can't believe I didn't think of that!" |
| 70% | DOH | 3 | "Can't believe I did that!" |
| 70% | PFFT | 4 | "You can't expect me to believe that!" |
| 69% | THENERVE | 8 | "I can't believe they did that!" |
| 69% | RUDE | 4 | "I can't believe you said that!" |
| 69% | SMH | 3 | "i can't believe u did that" |
| 69% | DUH | 3 | "Can't believe I missed something so obvious!" |
| 69% | TSK | 3 | "I can't believe you did that" sound |
| 67% | REGRET | 6 | Feeling that might accompany the words “I can’t believe I ate the whole thing” |
| 67% | GEEZ | 4 | "I can't believe that!" |
| 67% | SMH | 3 | "I can't believe you said that," in texting shorthand |
| 67% | SMH | 3 | "I can't believe you did that," in text shorthand |
| 66% | FACEPALM | 8 | [I can't believe that just happened!] |
| 65% | OMG | 3 | "I can't believe that!" in texts: Abbr. |
| 65% | GASP | 4 | "I can't believe that just happened!" reaction |
| 64% | OHMAN | 5 | "I can't believe that just happened!" (2 wds.) |
| 63% | GASP | 4 | Audible noise that means "I can't believe it!" |
| 63% | DOH | 3 | "Obviously! I can't believe I forgot!" |
| 62% | EARS | 4 | "I can't believe my ___!" ("Did you really just say that?") |
| 62% | ITS | 3 | I Can't Believe ___ Not Butter! |
| 61% | ATE | 3 | "I can't believe I ___ the whole thing" |
| 61% | ATE | 3 | "I can't believe I ___ the whole thing!" |
| 61% | ATE | 3 | 'I can't believe I ___ the whole chicken!' |
| 61% | WHOLE | 5 | "I can't believe I ate the ___ thing" |
| 61% | LET | 3 | "I can't believe I ___ this happen again!" |
| 60% | MORENO | 6 | Rita whose entire West Side Story Oscar-acceptance speech was "I can't believe it! Good Lord. I leave you with that." |
| 60% | OLEO | 4 | I Can't Believe It's Not Butter! product |