Preface To Buzz: Buzz Off!

Here's the thing.  If you look up the definition of "buzz off," not only is it "chiefly Brit." but it means "to go away; to leave; to depart."

But if you go to an online thesaurus & look for synonyms (is there a special figure of speech for phrases that are synonyms?) for "buzz off," you get these: "bugger off, scram, fuck off, get."

It seems like the phrase is not as innocent as one might think.

Let's go to the Urban Dictionary!

Oh that wasn't very nice.  It just says it means, "Go away."

It doesn't seem to be very polite to say "buzz off."  But is there a polite way to say it?