All slang has appropriate uses that doesn't mean it's not annoying. People say job and jobber every two seconds when talking about every named character in any martial arts manga. I can appreciate that the translation is going for that kind of thing but it's just annoying to me. I could go to any YouTube comment section and see the same annoying ass comments lol
Ahh, I get what you mean then. I try to keep out most slang unless it's dialectic or an exact fit (like here) for this exact reason, but I suppose "jobber" to martial arts manga fans is always going to be the king of annoying slang, especially when it's so frequently misused, too.
I definitely hate to see the word used in reference to Baki elsewhere, because it's almost always just being slapped on the loser of a fight where, in reality, the intention of the loss is for that character's development and not their victorious opponent. Kehaya and Alai Jr. are perfect examples of that. But as I say, here I thought it might've flown since it's the correct usage and they're talking about how there isn't actually any jobbing going on.