A party of excitement ... normally one of a celebrity, or someone's that you are hoping to pull, someone hot.
Normally you would spend about a week getting ready for it and would arrive full of glaciosity and also nervousnosity and jelloidnosity... you would hope to get hammered but not embarrass urself!
1) Elle: Its Kate's bday PARTEH next Saturday!
Jen: I am soooo full of ditherosity about what to wear!
Elle: I know, Kate's bro is well fit!