"dry behind the ears"

[Baubau]

English Language Tests, Intermediate level

ESL/EFL Test #461 "English Slang Idioms (203)", question 7

"Luke is a very good employee and has a great work ethic. He isn't completely ......... behind the ears yet though, if you know what I mean," Steve told Terry.

(a) hairy
(b) present
(c) wet
(d) dry

English Language Tests, Intermediate level

ESL/EFL Test #461 "English Slang Idioms (203)", answer 7

"Luke is a very good employee and has a great work ethic. He isn't completely dry behind the ears yet though, if you know what I mean," Steve told Terry.

Correct answer: (d) dry

Your answer was: correct
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Does "dry behind the ears" refer to maturity or to expertise?
Thanks.

[Kitosdad]

Both.
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Keep it simple ... Keep it interesting.

[Foah]

Germans also might say: Luke still has some egg scales behind his ears.

hehe

[Baubau]

Thank you honey.