(PERFECTING) [adjective] [disapproving] - behaving in a very formal and unnatural way by giving too much attention to unimportant details and trying too hard to be perfectHe's so precious about his work that he never gets anything done.Don't you hate the precious way she speaks, pronouncing each single consonant so precisely.
PRECIOUS
Meaning of PRECIOUS in English
Cambridge English vocab. Кембриджский английский словарь. 2012