Or, failing that, perhaps they used something before it had a name which made it popular. See also: design patterns and anyone who predates their popularity.
If the OP is interested in portraying "hackers" who aren't highly skilled, having them misuse terminology would be a good approach, for example portraying a later mastermind in his early, naive days. But portraying a world-class expert who uses hacker slang but can't get the technical terminology right would be a classic Hollywood error.
The language is an important component of functioning effectively in the domain. And it serves as a thinking aid, as well; it's very difficult to manipulate complex fields without the use of abstractions. Language is part and parcel of those abstractions.
I am in agreement with SiVal. Accurate communication is a clear measure.
Perhaps somewhat akin with the current "brogramming" fettish, one... "Hollywoodism" is to apply some sort of slangy techspeak "bravado" to "elite hackers".
That's B.S.
P.S. I should add that "taught himself" means a combination of reading, doing, and collaborating with others in his fields of interest.
He might have entered some of those fields kind of sideways, but once people within them observed and learned that he really knows what he is doing and what he is talking about, that doesn't matter. (And that he quickly and thoroughly learns things he doesn't already know, when needed. Or... as often as not, before "needed", because of his driving interest.)
to the person who uses: LAMP servers, python script,ubuntu machines, etc. these items are matter of fact tools for what they do and are as sexy or dramatic as a hammer, saw or vice grip to a construction worker BUT to people being invited into a world they're not familiar with they become a welcome mat on the floor to a journey.
It's accurately portrayed. At the same time, it's not the center of the story. That is still the human component.
They spent a lot of time/effort in "Saving Private Ryan" getting the sound of the M1 clip ejection right. But nobody ever comments on or explains this in the movie.
Veterans watching the movie said they "got that right".
(I'm not saying that "Saving Private Ryan" doesn't bend reality in some ways for the sake of the story. But they didn't... have Rambo take out a platoon with his bowie knife.)
("Band of Brothers" is another good choice -- the mini-series precursor to "Saving Private Ryan".
Then there are, for example, some of the older, somewhat spartan but impactfully understated British films, whose titles I can't think of right now. It was actually films like these that I was thinking more of, when I started writing this, before those contemporary items came to mind.)
If done properly, such portrayals can convey a quiet, authoritative air that is actually more convincing than some of the "explained"... "exaggeration" and/or simplification that exists in many movies including some big budget production.
Aiding this might be spending some time actually explaining these things, in some depth, to the actors, so that they can portray them with some understanding, rather than simply parroting the script.
Of course, you might have to convince/sell a potential purchaser/producer on this idea, to help the technical content go down.
P.S. I should probably shut up, now.
But, I think there is something to an accurate portrayal that is the richer for not being too self-conscious (on screen).
P.P.S. A few random films, with different topics, where this might apply, that I'm happening to think of upon this unplanned attempt to come up with some relevant examples.
"China Syndrome" (although I'm a bit hesitant, having only seen this with commercials and while somewhat distracted)
"Traffic" -- the older, European mini-series version, from the 1980s
Watch "Eat Drink Man Woman" and see how much of a feel for 90's (upper classs-ish) Taipei you walk away with. (Although, admittedly, as I understand it Ang Lee brings a certain outside or cross-cultural perspective to it from his having spent significant time abroad.)
There are probably many better examples, but that's what my tired mind can dredge up, at the moment. And I think this represents a variety of things where authenticity enhances rather than confuses or degrades.
P.P.P.S. See P.S., above. ;-)
I don't have a list at hand and may not be the one to provide one. But... you might look around and cross reference comments to find the "quintessential" works on these topics.
One exceptional book can be worth (more than) a car load of the alternatives.