The worthless fat above a womans pelvic area. It is the rather large size roll below her tummy, and while running your hand downward it makes the sound of BLUBUMP!! In order to have sex with a woman wearing a blubump you must first lift it out of the way in order to gain access to the vagina.The un-official name for it is a front-butt.
Bulublu is used when someone is so sad that the word "sad" is too much of an understatement.
Can aleso be used instead of words like weird, bad, horrible or annoying.
If two people are really close it can be used as a nickname.
OMG he cat died that is so blublu.
Awe you're so sweet you little blublu.