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."