An overly aroused vagina. During sexual arousal, and particularly the stimulation of the clitoris, the walls of the vagina self-lubricate immensely, causing the soft elastic folds of mucous membrane to become overly and ridiculously wet. Like, dripping.
"Oh my god, Melanie, last night I kept looking up pictures of Jake Gyllenhal and by the end I had the craziest rager."
Notorious in college but high school can have major ones as well. Its not just a party but a massive party that usually consists of crazy shit happening. Keggers are a must. The party is so full that you can barely move around.
Yo man there is a rager pool party happening tonight at TA's