[F]or Moody, on this Occaſion, took a large Glaſs from him, and threatned to blow his Brains out, (a favourite Phraſe with theſe Pyrates) if he muttered at it.
1763, John Shebbeare, Lydia, or Filial Piety: A Novel, volume 3, page 66:
In Conſequence of this a profound Silence enſued, the Earl depending on his Skill in the Sword, longing to run the Baronet through the Body; and Sir Timothy, knowing himſelf a good Shot, to blow the Earl’s Brains out.
1783, The Trial of Lieutenant Charles Bourne, Upon the Prosecution of Sir James Wallace, Knt. for an Assault, page 54:
Sir James Wallace pulls out a piſtol from his pocket and cocks it, and ſays, if you ſpeak to me I will blow your brains out immediately