Top Definition
The peak of sexual pleasure while listening to Niall Horan Sing.
Kayla: OMG Have you listen to One Directions new song "Over Again"?
Casper: You know it!!!! I had an extreme Niallgasim when his part came up!!!!
Kayla: Me too!!!! His voice is like sex for your ears!!!!!
Casper: You know it!!!! I had an extreme Niallgasim when his part came up!!!!
Kayla: Me too!!!! His voice is like sex for your ears!!!!!
by C4$P3R
November 07, 2012
