Casper Smart Telling a Big Fat J. Lo Lie

9/24/2014 12:02 AM PDT

Casper Smart -- Telling a Big Fat J. Lo Lie

TMZ TV

Casper Smart ... the guy Jennifer Lopez dumped ... tells us he hasn’t seen J. Lo's “Booty” music video. Problem is, EVERYONE has seen that video!

So is Casper lying, bitter, or bored with her butt? All of the above?