Green’s Dictionary of Slang

a euph. for any unspecified obscenity; thus as adj. asterisked.

1903		Bulletin (Sydney) 1 Oct. 16/2: Pull, you blanketty dash asterisks. Pull, you half-baked, dodgasted blanky sons of niggerdom! What were you made for, you swarthy, sodden lumps of blooming misery? Pull, you slummocky fag ends of blanky creation!
1907		Sun. Times (Perth) 3 Mar. 4/8: Why the asterisk didn’t you do it?
1916		‘Anzac’ On the Anzac Trail 100: ‘Rush the adjectived, asterisked, double-starred sons of lady dogs, boys!’.
1929		R.E. Howard ‘Pit of the Serpent’ Fight Stories July 🌐 ‘Blank, exclamation point, and asterisk!’ I roared.