The sign for "incompetent" is used to mean such things
as "inept" or "no good at."
INCOMPETENT:
(Version 1)



Animation: INCOMPETENT:

(Version 2) You may see differences in the handshape. You might
even see some people do the sign with a forward twist of the dominant hand
rather than backward twist.
INCOMPETENT:



Note: In the sign above, think of the non-dominant hand as
representing your brain, and your dominant hand representing the
thickness of your skull. Hmmm. Not very flattering. Best to
picture it with someone else's brain and skull.
Hey now, cut that out.
Notes:
Cultural tip: The sign INCOMPETENT (version 1) can be done on your ear
to mean “deaf.” It
is okay for Deaf people to sign “DEAF/EARS INCOMPETENT” this way, however if a
Hearing person signed “EARS INCOMPETENT” it would generally be considered
inappropriate or even a bit rude. Sort of like they were overstepping
their boundaries.
The “DEAF/EARS INCOMPETENT” sign in addition to conveying the idea of "blown
speakrers" (ears that don't work) it also conveys an attitude of "belonging to the Deaf
Community." It's use denotes membership. Thus if that sign is used by non-members
(such as sign language students) or by
fringe members it doesn't seem appropriate.
You can learn
American
Sign
Language (ASL) online at American Sign Language University ™
ASL resources by Lifeprint.com © Dr. William Vicars