Donkay means many things. Originally it was an expression of excitement, as in, you are in an airport on your way to a hedonistic Hawaiian vacation and you exclaim, "Donkay!!"
Oddly, it morphed into meaning, "penis" and then started being used to describe the sex act, even the
vagina. It morphed again as a term of endearment, "Hey donkay girl"- it can even be used as a salutation, as in "donkay" (initial
text to someone)- that person might respond with, "Donkay!" or
something entirely different like, "what are you up to?"
Again, "Donkay" means many things.