| 100% | UGH | 3 | "I can't believe this!" | 
| 100% | OHMAN | 5 | "I can't believe this!" | 
| 100% | NOTAGAIN | 8 | "Ugh, I can't believe this keeps happening!" | 
| 97% | OHNO | 4 | "I can't believe this is happening to me!": 2 wds. | 
| 95% | LET | 3 | "I can't believe I ___ this happen again!" | 
| 92% | UGH | 3 | "I can't believe this mess!" | 
| 91% | SMH | 3 | "I can't believe this," in texts | 
| 89% | OHNO | 4 | "I can't believe this is happening!" (2 wds.) | 
| 89% | OHNO | 4 | "I can't believe this is happening!": 2 wds. | 
| 89% | OMG | 3 | "I can't believe this!" in text speak: Abbr. | 
| 88% | SMH | 3 | Texter's "I can't believe this" | 
| 86% | SMH | 3 | Texter's "I can't believe this!": Abbr. | 
| 86% | SMH | 3 | "i can't believe u said this" | 
| 85% | SMH | 3 | Texter's "I can't believe this is happening" | 
| 81% | ITS | 3 | I Can't Believe ___ Not Butter! | 
| 78% | OLEO | 4 | I Can't Believe It's Not Butter! product | 
| 77% | SPREAD | 6 | I Can't Believe It's Not Butter, e.g. | 
| 75% | DOH | 3 | "Obviously! I can't believe I forgot!" | 
| 75% | DUH | 3 | "I can't believe I missed that!" | 
| 75% | MEANDMYMOUTH | 12 | "I can't believe I said that" | 
| 74% | ATE | 3 | "I can't believe I ___ the whole thing" | 
| 74% | ATE | 3 | "I can't believe I ___ the whole thing!" | 
| 74% | ATE | 3 | 'I can't believe I ___ the whole chicken!' | 
| 74% | WOW | 3 | "I can't believe what I'm seeing!" | 
| 74% | OMG | 3 | [I can't believe what I just read] | 
| 74% | WHOLE | 5 | "I can't believe I ate the ___ thing" | 
| 74% | DUH | 3 | "I can't believe I missed that question!" | 
| 72% | GOSH | 4 | ''Can't believe this'' | 
| 72% | DUH | 3 | "I can't believe I didn't think of that!" | 
| 72% | BUGEYES | 7 | "I can't believe what I'm seeing!" facial reaction |