Shivergasim 

An orgasmic sensation felt in the form of the shivers or goosebumps

When you hear a song that you have not herd in a while and it reminds how good it is you soemtimes exprience a shivergasim

Shivergasim by Matt Bushman October 16, 2005

Shivergasm 

When you get a full body shiver.

-UGHAAAHHHH
--Wtf was that?
-Don't worry bout it dude, just a shivergasm.

Shivergasm by Rosswell December 16, 2010