Dear Student,
Not to worry, even if you do the "palm orientation" aspect of the sign
"firefighter" wrong it still won't mean "b_stard" since the meaning of
the sign "b_stard" depends on a complex combination of the speed of the
sign, the force with which it contacts (or comes near) the forehead, the
number of contacts (one vs. two) the facial expression, and the context
(other signs in the sentence).
Novice ASL instructors and/or Hearing ASL instructors who learned ASL
from a classroom rather than from the Deaf Community tend to make a big
deal out of "near misses" between common signs and swear signs. This
provides "shock" value and some amusement to keep their
students interested--but in the
real world, it isn't much of an issue.
I encourage instructors to teach whatever version of a
sign is used in their area. If two versions are common, I suggest
learning and teaching whichever version is used on more of a national
scale.
As a student you should do whatever sign you need to do in order to get an "A" grade from your instructor,
then after that do the versions you see adult, skilled Deaf
native ASL signers consistently doing at
community events in your area.
Regardless, I appreciate you sharing
your story and mentioning that variation. Please do be gentle with
your current instructor, for all I know, that might be a very
popular sign in your geographical location. It is a cool variation
that has a great tie-in to either the badge worn on some helmets and/or
the light/bulb worn on some helmets. When time permits, I plan on adding
that version to my fireman page. :)
Cordially,
Dr. V