An F-Bomb is when the word "Fuck" is dropped by mistake or used in an inappropriate place. Otherwise it's just the word "Fuck". Casual or general use of the of word "Fuck" an is not an "F Bomb".
A movie that uses the word "fuck" repeatedly is not "dropping f-bombs".
David - "...and now Bob with the weather."
Bob - "The weather today is going to be... fuck, who's running the teleprompter? Are we live?"
David - "We'll get back to the weather shortly and we apologize for the f-bomb Bob just dropped."
Irrelevantly referencing the French post-modernist philosopher, Michel Foucault, in a conversation: Usually done as a vain and pompous attempt to appear more intelligent/ well read than one actually is.
"Come on man, did you really have to raise your hand drop an f-bomb when the professor was lecturing about the Battle of Gettsyburg?"