Definition of "splasher"

splasher

noun
plural splashers
1. Someone who splashes.
  Quotations
  They gave her room, all right, especially if her medium happened to be water color, as Judy was a grand splasher and spared neither water nor paint.
  1915, Nell Speed, Molly Brown's Orchard Home‎
2. (dated) A guard to keep off splashes from anything; especially, one of the guards over the wheels of a carriage, locomotive, etc.
  Quotations
  No. 6959 is painted in the standard wartime black livery and, like its immediate predecessors, does not carry a nameplate, but the words "Hall Class" have been painted on the middle coupled-wheel splasher.
  1944 November and December, “Modified G.W.R. "Hall" Class Locomotives”, in Railway Magazine, page 350
3. (MLE, slang) A knife (for it does wettings).
  Quotations
  Juice man up with this 15 inchLike, now I got blood on my splasher
  2020 August 13, Blacz (lyrics and music), “TwentyTwo”‎, 1:21–1:26