A sexual act involving a woman or a man melting Laffy Taffy's directly into his or her anus. The burning, cult sensation was made popular in San Francisco night clubs in the early 80's by Bar Rescue star Jon Taffer.
"Hey, lets melt some Laffy Taffy in our butts before sex. I bet it burns nice, they did it in the 80's. Its called a Laffer Taffer."
A person holding cum in their mouth so it may be dipped out with chips for consumption. She may also spit the dip onto the chips like a fountain...hence LaFountain.
Your mom just had some of my LaFountain dip out of your sisters mouth.
Your mom just LaFountained all over those chips with my gorilla grease. I would stop eating those if I were you.