having the nap worn off so as to lay bare the threads of the warp and woof, as a fabric, garment, etc.
wearing threadbare clothes; shabby or poor: a threadbare old man.
meager, scanty, or poor: a threadbare emotional life.
hackneyed; trite; ineffectively stale: threadbare arguments.
Origin: 1325–75; Middle English thredbare. Related forms
is always a great word to know.
So is ninnyhammer. Does it mean: