What does しょっぽい mean? I heard this the other day, and I can't find it in my dictionary. From the context, it seemed to be used with the meaning of "disappointing," or "a let-down."

I'm more familiar with the adverb , meaning _"down in the dumps, downhearted, blue"_. Looking into this some, I've discovered related terms , , , and , all with the same basic meaning.

From this, I would guess that is part of this same group. The ending is an adjectivizing suffix meaning _"-ish"_ , so presumably would mean _"bluish (of mood), kinda depressed or depressing"_.

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As others have noted in the comments to the question, the asker's may be a mis-hearing or alteration of , itself derived as the simple adjectivization of the root + .