so-soish en · ADJ
Etymology
From so-so + -ish.
Meanings
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(not-comparable) Thoroughly unimpressive; mediocre.
[…] being one of very great merit and beauty, which, to say the truth, is more than we dare affirm of any of those we here notice, for they strike us as being of a very so-soish character.
1840, William Laxton, The Civil engineer and architect's journal: Volume 3, page 188: