What have we stopped noticing?
The things we say, do, and accept without thinking twice.
Look closer where it comes from, what it assumes, and the case for keeping it
What you mean by it
Disappointing, weak, uncool.
What it's actually picturing
The original sense is impaired movement. “Weak, unconvincing” dates to the 1300s; the slang “uncool” only to the 1940s.
What it takes for granted
The figurative use keeps a link between physical impairment and being worth less.
Worth knowing
Many speakers intend no reference to disability, and precise alternatives are easy.
The case for keeping it
Words detach from their origins all the time, and many speakers no longer connect the two senses.
Say it plainly
That's weakThat's disappointing
Or have some fun
That's a miss