Superfluous, Unnecessary, Uselessness
A forehead table is completely superfluous.
Seriously, you don't need a forehead table. It's totally unnecessary to have a table made of foreheads and is a superfluous purchase. First of all, getting all those foreheads is a waste of people. Second, forehead tables aren't very strong. Superfluous, superfluous, superfluous.
じょう
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The only person you know with a superfluous forehead table is Joe (じょう), the ten foot tall, simple farmhand.
Now every time you visit Joe, you’ll have to look at his giant, superfluous forehead table. Imagine how gross it looks, with dozens of foreheads protruding from its surface. Only Joe would buy such a thing.