The song is about letting go of dreams, of the depressed mood that swamps you when you realise what you really want slips away from your reach. "All my colours turn to clouds" and "that box you gave me burnt nicely" clearly indicates that, as does the whole feeling of the song. The 'zimbo' was done by coincidence in fact: they wanted some word to fill the gap between the other parts of the song, and at some moment Ian just said 'Jimbo Jimbo' refering to a Doors record playing, they thought that actually looked quite good to fill that space but did change it to 'zimbo zimbo' as it somehow fitted better they thought.
The song is about letting go of dreams, of the depressed mood that swamps you when you realise what you really want slips away from your reach. "All my colours turn to clouds" and "that box you gave me burnt nicely" clearly indicates that, as does the whole feeling of the song. The 'zimbo' was done by coincidence in fact: they wanted some word to fill the gap between the other parts of the song, and at some moment Ian just said 'Jimbo Jimbo' refering to a Doors record playing, they thought that actually looked quite good to fill that space but did change it to 'zimbo zimbo' as it somehow fitted better they thought.