To have spent money buying alcohol to drink.
Came across it c.50years ago when a teenager on a building site.
I think it may be where "pissed up" meaning to be drunk came from.
Synonyms for Pissed up the wall
On this page, you will find 30 slang terms related to pissed up the wall. Some of the top words include: shut down, flambosted, routed by the liquid viking, fuckered up, tanked, and 25 more.