elephant

have a memory like an elephant

to be very good at remembering things. 'I remember where I first saw her - it was at Tim Fisher's party about ten years ago.' 'Yes, you're right - you've got a memory like an elephant!'

See also: like, memory

a white elephant

something that has cost a lot of money but has no useful purpose. The town's new leisure centre, recently completed at a cost of ten million pounds, seems likely to prove a white elephant.

See also: white