When someone just seems to take to something, getting on smoothly, fitting in perfectly, and having the time of her life --yet in fact she is completely messing up the job. Example: Jane took to her new job like an ape to an empty shirt. It was her favourite job yet, but the company shut down within a week due to her imcompetence.
LIKE AN APE TO AN EMPTY SHIRT
Meaning of LIKE AN APE TO AN EMPTY SHIRT in English
Slang English vocab. Английский сленговый словарь. 2012