look up any word, like jamflex:
 
1.
The smallest mammal resident on the isles of Great Britain. Often used to compare against other things that are also very small indeed.
Phil - Ben, how's your Egg, Beans & Sausage?
Ben - Rubbish, the sausage is about as big as a Lavatory Shrew
by zzwill December 01, 2011