1) Originally coined by makers of the Halo game franchise.
2) It is used to define a feat or a deed that is nearly impossible to achieve.
3) It is the opposite of "Bullshit" or BS.
4) Does not involve BS,luck. Involves true courage.
5) In the Halo game, you earn a Bulltrue batch when you take out an enemy who is charging at you with one of the most deadliest weapons in the game - Energy Sword.
Did you see what he just did ? He smashed 5 home runs to pull an upset against the best team in the league. Bulltrue !