Fig. to announce shocking or startling news. They really dropped a bombshell when they announced that the mayor would resign. Friday is a good day to drop a bomb like that. It gives the business world the weekend to recover. They must choose their words very carefully when they explode a bombshell like that.
http://idioms.thefreedictionary.com/bombshell
Bombshell. The term bombshell is a forerunner to the term sex symbol and originally used to describe popular female sex icons. Modern slang refers to a bombshell as an extremely sexually attractive woman.
http://www.definitions.net/definition/bombshell
Flattering words will not be spoken from the mouth of an affectionate person.. (Bhutanese proverb). A mouth that praises and a hand that kills. (Arabic proverb).
http://www.audioenglish.org/dictionary/bombshell.htm
Make an unexpected or shattering announcement. For example, Bill dropped a bombshell when he said he was quitting. This expression, which alludes to the destruction caused by a falling bomb, dates from World War I.
http://idioms.thefreedictionary.com/bombshell
Chance favors the prepared mind. (English proverb). We do not inherit the world from our ancestors; we borrow it from our children.. (Native American proverb, tribe unknown). Thought he was a great catch, turns out he is a shackle. (Arabic proverb). You're correct, but the goat is mine. (Corsican proverb).
http://www.audioenglish.org/dictionary/explode_a_bombshell.htm
Princeton's WordNet (0.00 / 0 votes) Rate this definition: bombshell (noun). an entertainer who has a sensational effect. she was a blonde bombshell. bombshell, thunderbolt, thunderclap (noun). a shocking surprise. news of the attack came like a bombshell. bombshell (noun). an explosive bomb or artillery shell.
http://www.definitions.net/definition/bombshell
The first woman to be known as a bombshell was Jean Harlow, who was nicknamed the blonde bombshell for her 1931 film Platinum Blonde. Two years later she starred in the Metro-Goldwyn-Mayer film Bombshell.
https://en.wikipedia.org/wiki/Bombshell_%28sex_symbol%29
• EXPLODE A BOMBSHELL (verb). The verb EXPLODE A BOMBSHELL has 1 sense: 1. utter or do something surprising. Familiarity information: EXPLODE A BOMBSHELL used as a verb is very rare.
http://www.audioenglish.org/dictionary/explode_a_bombshell.htm
The term bombshell is a forerunner to the term  sex symbol  and originally used to describe popular female sex icons. In modern usage, bombshell refers to a very attractive woman.
https://en.wikipedia.org/wiki/Bombshell_%28sex_symbol%29
Hollywood soon took up the blonde bombshell, and then, during the late 1940s through the early 1960s, brunette, exotic, and ethnic versions (e.g., Jane Russell, Dorothy Dandridge, and Sophia Loren) were also cultivated as complements to, or as satellites of, the blonde bombshell.
https://en.wikipedia.org/wiki/Bombshell_%28sex_symbol%29
what is bombshell mean
A bombshell is an entertainer who has a sensational effect.