Webster’s Revised Unabridged Dictionary · 1913
So-so
So′-so′, a. [So + so.] Neither very good nor very bad; middling; passable; tolerable; indifferent.
In some Irish houses, where things are so-so, One gammon of bacon hangs up for a show. Goldsmith.
He [Burns] certainly wrote some so-so verses to the Tree of Liberty. Prof. Wilson.
So′-so′, adv. Tolerably; passably. H. James.