A word made famous by rapper, Kid Cudi on his Twitter page. A word to define a party or event where peope are most likely to party extremly hard, drink excessively, roll on pills and smoke tons of weed. Ragetastic parties are usually not going to be remembered the next day,due to heavy drug use.
Symone's party last night was ragetastic. Everyone was shit-faced after they faced the 4th blunt!
When you are so angry and horny, you begin to fap furiously, but right before you come, you punch the tip of your penile instrument, causing the same effect as if you were to put your thumb at the end of a garden hose.
When tkmr plays a first person shooter, and repeatedly gets spawn killed, he gets so angry he suddenly rages out, then furiously ragefaps.