Dangerous; heart-breaking.
For amongst his other killing parts,
He had broken a brace of female hearts.--Hood's Miss Kilmansegg.
There was a pleasant, playful breeze that sported with the well curled locks of first-water dandies [on New Years Day], and gave them a certain négligé appearance, which must have been really killing 'in my lady's chamber or drawing-room.'--N. Y. Commercial Advertiser, Jan. 2, 1844.
The dandies forgot to oil their moustaches, or waste killing looks on unthinking shop girls whom they met, &c.--Boston Times, Nov. 13, 1845.