[wet] 
adjective, wet⋅ter, wet⋅test, noun, verb, wet or wet⋅ted, wet⋅ting.| 1. | moistened, covered, or soaked with water or some other liquid: wet hands. |
| 2. | in a liquid form or state: wet paint. |
| 3. | characterized by the presence or use of water or other liquid. |
| 4. | moistened or dampened with rain; rainy: Wet streets make driving hazardous. |
| 5. | allowing or favoring the sale of alcoholic beverages: a wet town. |
| 6. | characterized by frequent rain, mist, etc.: the wet season. |
| 7. | laden with a comparatively high percent of moisture or vapor, esp. water vapor: There was a wet breeze from the west. |
| 8. | Informal.
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| 9. | using water or done under or in water, as certain chemical, mining, and manufacturing processes. |
| 10. | something that is or makes wet, as water or other liquid; moisture: The wet from the earth had made the basement unlivable. |
| 11. | damp weather; rain: Stay out of the wet as much as possible. |
| 12. | a person in favor of allowing the manufacture and sale of alcoholic beverages. |
| 13. | Informal: Disparaging and Offensive. a wetback. |
| 14. | to make (something) wet, as by moistening or soaking (sometimes fol. by through or down): Wet your hands before soaping them. |
| 15. | to urinate on or in: The dog had wet the carpet. |
| 16. | to become wet (sometimes fol. by through or down): Dampness may cause plastered walls to wet. My jacket has wet through. |
| 17. | (of animals and children) to urinate. |
| 18. | all wet, Informal. completely mistaken; in error: He insisted that our assumptions were all wet. |
| 19. | wet behind the ears, immature; naive; green: She was too wet behind the ears to bear such responsibilities. |
| 20. | wet one's whistle. whistle (def. 16). |
| 21. | wet out, to treat (fabric) with a wetting agent to increase its absorbency. |
| wet (wět) adj. wet·ter, wet·test
v. tr.
[Middle English, from Old English wǣt; see wed-1 in Indo-European roots.] Synonyms: These adjectives mean covered with or saturated with liquid. Wet describes not only what is covered or soaked (a wet sponge) but also what is not yet dry (wet paint). Damp and moist both mean slightly wet, but damp often implies an unpleasant clamminess: a cold, damp cellar; a moist breeze. |
Immature, inexperienced, and na&idie;ve: “Don't rely on his advice about girlfriends; he's still wet behind the ears.”
wet
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wet behind the ears
Also, not dry behind the ears. Immature, inexperienced, as in How can you take instructions from Tom? He's still wet behind the ears, or Jane's not dry behind the ears yet. This term alludes to the fact that the last place to dry in a newborn colt or calf is the indentation behind its ears. [Early 1900s]