splosh, n.² — Green’s Dictionary of Slang

splosh n.²

[SE splosh, the sound of a liquid falling or having something dropped into it]

tea.

1959		F. Norman Fings I i: I gotta earn a living, ain’t I? Get us a cup of splosh, Lil.
1979		F. Norman Too Many Crooks Spoil the Caper 23: Give us a cup of splosh and an egg and tomato roll.