similar to DUI, apparently. When you get high on whatever substance, usually alcohol, and "set the record straight" with exes; family; coworkers; old teachers, etc.
I dialed while intoxicated and called my best friend from first grade and we decided to join the Marines.
These other definitions are good; this seems to be primarily Scottish/British Isles; See Franco Begbie for true enlightenment
Rent boy, ya doss cunt; gies us a zigarette, fir FUCK's saik!!!