Mind-boggling cleavage of unrealistic proportions that will never be encountered or experienced in the everyday, merely seen thanks to a particular medium. Impossicleavage is an example of the hyperreal and, by and large, is a construct rather than a naturally occurring state of boob.
Dude 1 - Facebook's sidebar ads for dating and singles sites seem to feature an inordinate amount of impossicleavage.
Dude 2 - I concur. Let us conduct exhaustive research.
Dude 1 - Capital.