The thematic title to a particular person(s) 28th Birthday Party. Similar to when an individual reaches the age of 30, that occasion being dubbed "Dirty 30", this is for those individuals celebrating their 28th birthday, ESPECIALLY should they possess the character and aesthetics as a late-teen or early-twenty-something.
Hey dude, I heard it's your birthday.
How old are you now?
Nooo waaay, it's your Still Looking Jail Bait 28.
Two mores years to the Dirty 30.
Yeaah (Le sad).