Green’s Dictionary of Slang

1. (US short order) soup.

1916

Day Book (Chicago) 8 Sept. 17/1: ‘One order of pea soup,’ a customer will say. ‘Splash of split peas,’ cries the waiter. [...] ‘I want a bowl of tomato soup,’ ordered another, [...] ‘One splash of red noise’.

2. (UK black/gang) blood.

2017

Loaski ‘Behind Barz’ 🎵 I jugg with the tool, splash don’t fall in a pool.

3. (UK black/gang) a knife.

2017

Harlem Spartans ‘Money & Beef’ 🎵 Spartan step, splash strapped under my tee / Bet I see bare man bleed / [...] / I bet we make bare mums scream.

4. (US) a kill, a corpse.

2017

S.M. Jones August Snow [ebook] A blast from my rifle and his head blossomed crimson. ‘Splash one,’ I heard Frank’s voice say over the walkie-talkie.