| 100% | SILLYME | 7 | "Whatever was I thinking?" |
| 83% | SILLYME | 7 | "What was I thinking?" |
| 83% | DOH | 3 | "What was I thinking?!" |
| 83% | DOH | 3 | “What was I thinking?” |
| 83% | STUPIDME | 8 | "What was I thinking?!" |
| 83% | DOH | 3 | "What was I thinking!?" |
| 79% | SILLYME | 7 | "Gosh, what was I thinking?!" |
| 78% | DAMN | 4 | "What the hell was I thinking?" |
| 76% | ESPTESTS | 8 | Reasons to ask, ''What was I thinking?'' |
| 76% | DESCARTES | 9 | I think, therefore I am |
| 75% | WHOSE | 5 | "___woods these are I think I know": Frost |
| 75% | WHOSE | 5 | "__ woods these are I think I know": Frost |
| 75% | WOODS | 5 | "Whose ___ these are I think I know": Frost |
| 73% | IMO | 3 | "What I think is...": Abbr. |
| 72% | IAMBI | 5 | "Whose woods these are I think I know" has four |
| 72% | IAMBS | 5 | Quartet in "Whose woods these are I think I know" |
| 72% | OHSAY | 5 | “Hey, I was thinking ...” |
| 72% | IMO | 3 | "What I think is ...," in texts |
| 72% | IMO | 3 | Texter's "What I think is..." |
| 72% | IMHO | 4 | "What I think is ...," in texts |
| 72% | RENEDESCARTES | 13 | "I think, therefore I am" |
| 71% | IAMB | 4 | One-quarter of "Whose woods these are I think I know" |
| 70% | IMO | 3 | "What I think is ...," in a text |
| 70% | NOT | 3 | "You're ___ who I thought you were" |
| 69% | THERE | 5 | "Oh, ___ you are" ("I thought I lost you!") |
| 69% | CAPS | 4 | "UH-OH, I THINK MY ___ LOCK IS ON!" |
| 69% | RENE | 4 | "I think, therefore I am" philosopher Descartes |
| 68% | YOUTOO | 6 | "And here I thought I was the only one" |
| 68% | NOTAGAIN | 8 | "Ugh, I thought last time was the last time" |
| 68% | NOTAGAIN | 8 | "Ugh! I thought we were over this!" (2 wds.) |