To be heavily under the influence of illicit drugs. MDMA (ecstasy) In particular.
raver 1: I was fucking spannered last night mate
raver 2: Yeah i saw the pictures, 3rd degree gurns and your eyes were falling into the back of your head mate!
By Dixie
Spanners
Euphemistic swear word, used to avoid giving offence, especially when need arises to curse in front of children.
Derived from the idiom that when something goes wrong it is known as 'throwing a spanner in the works".