A con-job that requires a certain amount of effort and as a namesake, is usually in it for the long haul. Gaining someone's trust for a number of months and then when the stake is in your court and you have their complete trust--taking advantage of it. Usually denotes relationship status or high-level business partnerships.
'The senior manager was in it for the long con. 3 years to nab 8.3 million dollars.'
by An observant human being, June 30, 2015