Wiktionary
vb. 1 (&lit blow away English) 2 (context transitive English) To cause to go away by blowing, or by wind. 3 (context intransitive English) To disperse or to depart on currents of air. 4 (context transitive idiomatic English) To kill (someone) by shooting them. 5 (context transitive idiomatic US English) To flabbergast; to impress greatly. 6 (context transitive English) To overwhelm.
Wikipedia
"Blow Away" was a 1979 hit single by George Harrison, taken from his eponymous album.
Usage examples of "blow away".
Not only did it blow away the bulk of the wave of Magh' who had been pressing forward, but it also hardened the slowshields behind them.
CLs would be bad enough, but heavy cruisers or battlecruisers could blow away almost any of our convoy escorts, given our general draw down of forces.
And then at last, in the shadow on the other side of the moonlight which came like silver between, he saw the form to which the hands belonged: a small withered creature, so old that no age would have seemed too great to write under her picture, seated on a stool beyond the spinning wheel, which looked very large beside her, but, as I said, very thin, like a long-legged spider holding up its own web, which was the round wheel itself She sat crumpled together, a filmy thing that it seemed a puff would blow away, more like the body of a fly the big spider had sucked empty and left hanging in his web, than anything else I can think of.
They would blow away like seeds on the wind, and the Romans would never catch the half of them.
He looked like he would blow away the minute he stepped out of his house.
The Cardassians could blow away the substation, assert their own claim, and justify it all with a legal defense of necessity.
If exposed to sunlight on a fresh spring day, a living cell would wither and turn to dust, and its DNA would blow away in the wind.