the tree ochroma lagopus. Light wood
that easily foats and is breakable. Wood
used for modelling. A piece of balsa: A useless
item liable to break. Not well
constructed. cf "pants, a pile of"
"That car's a piece of balsa" and "You can make
a model out of that!" (ie. it's balsa) as fearured on an Alexei Sayle recording: "Hello John Got a New Motor?"