What is [~~~]?
1.
The "raspberry" sound that you make with your mouth. There's really no way to spell it so this is how its symbolized.
Ex) From Family guy:
STEWIE: PASS THE MASHED POTATOES MEG
PETER: ~~~
STEWIE: MEG
PETER: ~~~
MEG: WHY ARE YOU MAKING THAT NOISE AFTER SOMEONE SAYS MY NAME?
LUIS: STOP BEING RUDE TO MEG.
PETER: ~~~~~~~~~
See 
Random Words:
1. 
Overwhelming pitch used by nasty Red Sox set-up man Hideki Okajima. The pitch is a changeup with screwball motion. It was developed when..