there is of course Sally Willow as in (Salix)
Avoid the Du Lally as proposed by "bystander", it derives from the large holding camp at Deolali near Bombay where "time served " soldiers waited (sometimes for many months) until a troopship with space to bring them home arrived and as they had no duties above the basic routine they were very bored and ocasionally went crazy, this was called "Deolali tap" which was "folk processed" into a synonym for crazy in Blighty