taken from the noun "hoser", this word is turned into an adjective meaning someone who gets drunk, "hosed", often and is in what seems a constant state of being drunk.
This was repeated pretty often in the old
Great White North show from SCTV, a
Canadian television show not been made since 1984.
Bob and Doug McKenzie were the two overly-accented Canadians in TGWN, that often repeated this phrase.