chewing gum

chewing gum – what your beloved pet dog is doing when it is destroying your dentures.

hippocampus

a college (esp. for hippopotamuses) which specialises in the study of the workings of human short-term memory.

selfish

a person who hoards the money he or she makes from selling a lot of fish. (origin – sell fish)

spring

the period after winter when farm machinery are said to “spring back to life.

sustainable economics

What economists think is possible but environmentalists know is not.

 

park ranger

The electronic device on the back of modern cars that warn you before you reverse into an endangered tree.