Your comment did, in fact, have the f-bomb fully spelled out. However, it was not deleted by a moderator. 

Comments with vulgar words are auto deleted as soon as they receive a single flag to comply with the network wide [behavior policy][1]. You can read more about it in [this meta post][2].


  [1]: https://bicycles.stackexchange.com/help/be-nice
  [2]: https://meta.stackexchange.com/questions/121225/flagged-comments-disappear-instantly-whats-going-on/121226#121226