Generally used to describe a situation where one persons faffing causes a series of faffs from several people, usually resulting in delay.
These faffs would most likely have not occured were it not for the initial faffer, therefore they have caused a faffalanche.
Example 1: Group of people just about ready to leave the house.
Person 1: "Taxi's here!"
Person 2: "Oh, hang on, im going to change my shirt"
Person 3: "I might change mine if you are"
Person 4: "Im going to use the toilet while you do that"
Person 5: "Im going to grab another beer then"
A faffalanche has been caused.
Example 2:
Person 2: "I might change my shirt"
Person 1: "Don't, the taxi's here and you'll cause a faffalanche"
The cascading flab that cliff-hangs over a belt buckle, or in particular, a pair of tight fittinghipster jeans. Most commonly seen on chubby pubescent girls.
Alt Def: When the flesh rolls of a morbidly obeseindividual land on you while sitting at a sporting event, public performance, or on a plane, bus, or train.
Ex. Jack almost got buried in a fatalanche when a giant fat kid sat next to him at the Tiger’s game.