look up any word, like smh:
 
2.
A state of being moderately down, but some way short of full-blown miserable.
-How are you?

-mmm, OK-ish.
by Dr. Fishcake August 20, 2009
 
1.
Adverb; This word is a slang term merging OK with the suffix -ish, thus downgradeing the defined subject to less than OK.
The movie was OKish, the action was good but the plot sucked.
by leopardessmoon August 29, 2009