| Not lawful | 10 |
| Not law-related | 15 |
| Not laughing or crying | 22 |
| Not laughing at a joke, maybe | 29 |
| Not laugh-out-loud funny, perhaps | 33 |
| Not later than | 14 |
| Not later | 9 |
| Not late-breaking news | 22 |
| Not latched, maybe | 18 |
| Not latched | 11 |
| Not lasting, to a Greek? | 24 |
| Not large | 9 |
| Not landbound | 13 |
| Not lallygagging | 16 |
| Not laid-back in the slightest | 30 |
| Not laid-back | 13 |
| Not laid on thick | 17 |
| Not laid back | 13 |
| Not lag | 7 |
| Not labored | 11 |
| Not kwik | 8 |
| Not kosher, in Jewish law | 25 |
| Not kosher | 10 |
| Not known: Abbr. | 16 |
| Not known | 9 |
| Not knowledgeable in the ways of the world | 42 |
| Not knowing where to turn | 25 |
| Not knowing what to do | 22 |
| Not knowing right or wrong | 26 |
| Not knowing right from wrong | 28 |
| Not knowing one's head from one's tail | 46 |
| Not knowing | 11 |
| Not know when to shut up | 24 |
| Not know from _____ | 19 |
| Not know from ___ (be ignorant) | 31 |
| Not know from ___ | 17 |
| Not know from __ B: be ignorant | 31 |
| Not knotty | 10 |
| Not knotted | 11 |
| Not knocked off | 15 |
| Not kissproof, as a cosmetic | 28 |
| Not kissproof | 13 |
| Not kiss-proof? | 15 |
| Not kindled | 11 |
| Not kin | 7 |
| Not kidding oneself | 19 |
| Not kidding | 11 |
| Not kick off | 12 |
| Not kept busy | 13 |
| Not keeping, as a promise | 25 |
| Not keeping up | 14 |
| Not keeping out the wind | 24 |
| Not keep up | 11 |
| Not keep to oneself | 19 |
| Not keep straight | 17 |
| Not keep secret | 15 |
| Not keep one's feelings pent up | 35 |
| Not keep one's distance, in a way | 37 |
| Not keep it real, in streetspeak | 32 |
| Not keep in the bargain | 23 |
| Not keep in | 11 |
| Not keep a secret | 17 |
| Not keep a poker face | 21 |
| Not keen | 8 |
| Not justified | 13 |
| Not just your average Joe | 25 |
| Not just yet | 12 |
| Not just words | 14 |
| Not just wolf down | 18 |
| Not just willing | 16 |
| Not just well-off | 17 |
| Not just well-done | 18 |
| Not just want | 13 |
| Not just up | 11 |
| Not just unfounded r-----, but ___ ___ | 38 |
| Not just under the weather | 26 |
| Not just turn down | 18 |
| Not just trim | 13 |
| Not just threaten, say | 22 |
| Not just threaten | 17 |
| Not just think | 14 |
| Not just theoretical | 20 |
| Not just temping | 16 |
| Not just tehee | 14 |
| Not just tear up | 16 |
| Not just tear | 13 |
| Not just sweep | 14 |
| Not just swallow whole | 22 |
| Not just surmise | 16 |
| Not just suppose | 16 |
| Not just suggest | 16 |
| Not just stupid | 15 |
| Not just stuff | 14 |
| Not just stout | 14 |
| Not just stirring | 17 |
| Not just squabbling | 19 |
| Not just some | 13 |
| Not just sniffle | 16 |
| Not just slow | 13 |
| Not just sit there | 18 |