A nick name for "Facebook" derived from users reconnecting with each other after years of no communication and seeing that each other has gained substantial weight.
"One of my high school ex gfs found me on fatbook last night. Man... she's twice the woman she used to be!"
A blunt so massive that it could be substituted for the long cylindrical tubes on a pontoon boat and still achieve the desired amount of flotation.
Dude those blunts were so fat that we could have strapped some plywood to those bad boys and taken them out on the lake. They were some fatoons for sure.