an abbreviation for the term "abbreviated language." Some terms of the abrev lang vocabulary include "awk"(awkward), "def"(definitely), "caf"(cafeteria), "aud"(auditorium), and "perf" (perfect)
abrev lang is often abused by teenage girls, making almost every word an abrev lang word.
Girl: Want to go to the caf?
Girl 2: Def!, that would be perf!
Girl: I hope it's not awk when use abrev lang in front of other people!