There are two versions (#2 is probably used more widely and more often):
1) A shortened version of the sentence: "
Doninnit, trust me blood there's a
Don in the place right now blood,
doninnit."
2) "innit" is added onto the end of words and "Tron" is the first part of the word. Tron is a completely random word. Other words that sound appropriate can be used here.