a sex act where a woman or man with a trachiotomy opening in their throat is performing fellatio. The man ejaculates, the partner swallows and the semen subsequently goes down the throat and out the trach opening, gushing much like niagra falls, with the runoff making its way down the chest.
Hey man, I fucked this chick that had one of those voice boxes, right? well she had some sorta surgery & has this hole in her throat. She sucked my dick & she swallowed. She said it wasn't her first Niagra Runoff.
by Valerie Vandersnatch-Woodcock July 25, 2011