Initially thought to be a term one of the members of NKOTB used to taunt fans and drive them crazy with wonder. His twitters posted multiple tinks each time causing thousands of replies on guesses of what tink was.
He has finally given explanation!
TINK The imaginary sound Jordan Knight hears from his eyes when he wakes up. Much like a cartoon sound I imagine.
Finally we can sleep at night now that we have the answer hehe
@jordanknight says
Tink! is the imaginarysound of my eyelids springing open when I wake up.................TINK!