[Mercuria]

If friends fire at you it is friendly fire.

If friends fire at you accidentally because they had no idea of who you were, it's "friendly fire".

If friends fire at you purposely with knowledge of who you are, it is an out-and-out attack.

[A. Pole]

If friends fire at you it is friendly fire.

If friends fire at you accidentally because they had no idea of who you were, it's "friendly fire".

If friends fire at you purposely with knowledge of who you are, it is an out-and-out attack.

OK, OK, so what about "unfriendly friendly fire"?