1. cascading pile of cellulite, usually located on the mid torso section of the body but in some rare occasions flabalanches have been reported in the jowl and thigh regions.
2. often associated with creatures that use the sir name jabba. see: jabba the slut
A: don't look now but your cousin is takin' off her shirt again.
A: that's got to be the biggest flabalanche i've ever seen! that's some seven layer burrito shit.
A Norman medieval weapon that was popular for a short time. It consisted of a hardened spear forged with an inner core of rancid anal vapor. If a foe managed to defeat a knight and break his spear, the encased, aged vapors were designed to bring him to his knees. The weapon lost favor when armies began invading Mediterranean countries where the stench from the B.O. overpowered the soured vapors.