So-so
/ˈsəʊˌsəʊ/
adjective
Neither good nor bad; tolerable, passable, indifferent.
“The dessert was pretty good, but the meal was so-so.”
Synonyms: average, comme ci comme ça, fair, lackluster, mediocre, meh, middling, okay
adverb
Neither very well nor very poorly.
“He performed so-so during the tryouts, and the coach was undecided whether to add him to the team or not.”
Synonyms: blandly, indifferently, insipidly, moderately, passably