I suppose that word is Kuso? I've seen it happen like you said many times. Now, does Kuso mean to damn something to hell? My Japanese isn't the greatest. A lot of Japanese curses don't have a literal translation, and s*** and damn it have the same feeling, so is it really supposed to be damn it? or is it up to the translators preference. In which case both are right, so there isn't any discrepancy from fansub to dub etc. Just two levels of cursing, both have thing same intent. And honestly, I can't imagine Vegeta self censsoring.

______________________