a beached whale

a beached whale

potentially offensive An extremely large or obese person. I really need to start exercising again. I've turned into a beached whale!
See also: beach, whale
References in periodicals archive ?
A BEACHED whale was blown up in front of horrified children yesterday after rescuers failed to get it back into deep water.
Our botulism prevention strategy: A beached whale is best regarded as fishy.