Languages evolve over time and as much as we might hate words being vandalised by roving bands of lexically-challenged youths, we can't really stop the march of our shifting vocabularies. Sometimes however, a good one sneaks in. Like "budgie smuggler". OK, good might be a little strong...
Yes, it's official -- at least for the Oxford English Dictionary. For the publication's June 2016 update, the sub-entry "budgie smuggler" has been added to its burgeoning pages.
Turns out OED doesn't shy away from the task of adding new entries -- the list of inclusions is extensive and if you have time, makes for an interesting read.
It also means budgie smugglers is in, uh, appropriate company:
budgie smugglers butt cheek butt crack butt plug butt-naked butt-ugly
Yeah, I think the OED has more than enough butts now.