{adj. phr.}, {informal} Experienced; knowing how to do something. Usually used in the negative. * /John had just started working for the company, and was not dry behind the ears yet./ Compare: KNOW ONE'S WAY AROUND. Contrast: WET BEHIND THE EARS.
DRY BEHIND THE EARS
Meaning of DRY BEHIND THE EARS in English
Dictionary of English idioms . Словарь английских идиом. 2012