The act of uncontrollably laughing, or having a giggle fit, at something that could actually be funny, or possibly not. A haver of a sillygasm will convulse while laughing, grab on to things tightly, and can not be easily stopped, as if they were having an orgasmic experience.

the thing that you don’t have when you’re phones percentage is over 20

When one is overwhelmed by the amount of Silly-Bandz one has or the amount a store has in stock!