Cock and bull story
"Cock and bull story" is an English-language idiom for a far-fetched and fanciful story or tale of highly dubious validity. It is often used to describe a description of events told by someone who is being deceitful or giving an excuse, perhaps unconvincingly. The first recorded use of the phrase in English was in John Day's 1608 play Law-trickes or Who Would Have Thought It:
What a tale of a cock and a bull he told my father.