What does 'SWLABR' on Cream's 'Disraeli Gears' album stand for?

"She Walks Like A Bearded Rainbow"

"Walks" is probably right, not "was" - see this link from Jack Bruce's official website:

http://www.jackbruce.com/disraeli1.htm

Which ties in (kind of) to the last few lines of the lyrics:

http://www.eric-clapton.co.uk/ecla/lyrics/swlabr.h...

Why the bizarre name?

One theory:

"The song title came from an incident when flowers were delivered one day to his flat. Jack Bruce had ordered them for his then girlfriend, but hadn't specified the type of flower. When the bouquet arrived, the chemically-enhanced pair of songwriters were impressed. Pete was particularly taken by the way the long stems of the flowers swayed around. He told Jack that the flowers reminded him of the way girls walk. The flowers turned out to be Irises - a variety known as "Bearded Rainbow". The rest is in the song."

For others, see:

http://www.songfacts.com/detail.php?id=1364

She Walks Like A Bearded Rainbow.

'She Was Like A Bearded Rainbow'.

I kid you not!