- prim, underwhelming, and ineffectual
C19: a blend of miserable and flimsy, coined by Lewis Carroll
Examples from the Web for mimsy
You might as well say mimsy bomtittle plays, you'd be saying as much.Touch and Go
D. H. Lawrence
Queen Caroline was a mimsy, out-moded woman, a sly serio, who gadded hither and thither shrieking for the unbecoming.