Green’s Dictionary of Slang

1. carbonated water as a mixer for drinks.

1986

Chapman NDAS.

2. a light shower of rain.

1986

Chapman NDAS.

3. any form of spray, e.g. of blood.

1998		C.G. Hart Death in Lovers’ Lane 160: I walked closer and brushed against flowing ferns and felt an icy spritz of water.
2003		C. Clyde Lady in Black 170: The exploding cranium decorated the large Italian baritone with a spritz of blood as his body whizzed backward.

4. a spontaneous stage performance.

1999

S.F. Weekly 17 Mat. 🌐 Lenny Bruce: Swear to Tell the Truth [...] seduces viewers with his off-the-cuff riffs and vibrant spritz, only to swing them into the vortex of his emotional whirlpool.

5. a spray, i.e. for applying liquid into a constricted space.

2023

(con. 1962) J. Ellroy Enchanters 65: [A]ppropriate props [...] included a nitro spritz for the safe.

6. see schpritz n.