Zig-zag
Catsood
"Having drink taken" (from the old court phrase "Not drunk, but, having drink taken, the accused did...")
Counting the cobbles/kirbstones (flat on one's face in the gutter)
"Not as think as some drunkle peep I am"
"Under the affluence of incerhol"
Rat faced, Rat arsed or (just ratted)
Pissed as a fart/rat/pudden (pudden not pudding)
Elephant's (Elephant's trunk - drunk)
Brahms (Brahmns & Lisdt - Pissed)
Elephant's and Mozart (parody of the above two)
Foggy
"Star shaped drunk" (from the habit of falling over backward, arms and legs spread, when intoxicated)
or one I've only ever heard once (but it amused at the time) -
"A bit sea-sick" (we were miles in-land at the time).

Regards

Walrus