Roaring Meg
noun1
Historical A large cannon; specifically, the large 15th cannon at Edinburgh Castle (more usually called ‘Mons Meg’), or the cannon used to defend Londonderry during the siege of 1688-9.
2
Archaic, Figuratively Any large or impressive thing.
- Musica est mentis medicina mæstæ, a roaring-meg against melancholy, to rear and revive the languishing soul […]1624, Democritus Junior [pseudonym; Robert Burton], The Anatomy of Melancholy: […], 2nd edition, Oxford, Oxfordshire: […] John Lichfield and James Short, for Henry Cripps, →OCLC, partition II, section 2, member 6, subsection iii:
3
Obsolete A kind of spinning top.