What is Rolling Pennies?
1.
The act of receiving pleasure from exploiting the enthusiasm of a stupid or mentally challenged person.
History of term:
"That geek Earl was so excited when we invited him to our sorority party. He bragged about it all week. That was so funny when he came over all dressed up in a tuxedo. We just locked the front door and wouldn't let him in! He didn't realize we were really rolling pennies on him."
See