a bigger lie than the cake
A huge lie that no one will ever believe to be true
Dude 1: If you stick a finger in that electric socket, I'll give you a million dollars.
Dude 2: Sweet!
Dude 3: Don't do it, man. The million dollars is a bigger lie than the cake.
Dude 2: Sweet!
Dude 3: Don't do it, man. The million dollars is a bigger lie than the cake.