Sucessful completion of the sex act, but only after outrageously exhaustive efforts. Usually used to describe a rather un-satisfying sexual experience which one has been working very hard at achieving and, upon completion, does not think it was worth it.
"Lisa was playing hard to get. I had to take her out six times and spend a fortune on her to get laid, and then all she did was lay there and complain the wholetime. What a choregasm!"