Stories We Like: A Guide to the Comma
"drunk," c.1900, colloquial, past participle adjective from slosh (v.).
1814, "slush, sludge, a watery mess," probably a blend of slush and slop (n.1) in its Middle English sense of "muddy place."
"to splash about in mud or wet," 1844, from slosh (n.). Meaning "to pour carelessly" is recorded from 1875. Related: Sloshed; sloshing.
Drunk: a youngish man in a bar, a little sloshed and pouring out his troubles to the bartender/ You'll spend the night getting sloshed on 3.2 salmon piss
[1900+; fr slosh, ''a drink,'' found by the 1880s]