na-adjective
Describes actions or attitudes done openly without hiding, often with a nuance of boldness or shamelessness. Commonly used in the adverbial form おっぴらに.
彼はおっぴらに悪口を言う。
He openly speaks ill of others.
おっぴらな態度で嘘をつくのはやめてほしい。
I wish you'd stop lying with such an open attitude.