na-adjective, noun which may take the genitive case particle 'no', noun
ordinary; common; mediocre; nothing special
A yojijukugo meaning something is unremarkable, run-of-the-mill, or not standing out. Often used in negative contexts to emphasize lack of distinction.
His grades are ordinary, with nothing particularly outstanding.
この店の料理は尋常一様だが、値段は手頃だ。
The food at this restaurant is nothing special, but the prices are reasonable.