Big Ben
Refers to the famous clock tower in London.
When I go to London, I want to see Big Ben.
Jocular, vulgar pun on 大便 (daiben, 'feces'); used humorously.
See also: 大便
Saying 'I feel a Big Ben coming' is a crude joke.
The name is borrowed from English Big Ben. Its feces sense is a Japanese pun on the similar-sounding 大便.