The amount of money it would take for one to comprimise your morals or ethics. In short, the amount of money or kind of favors one would require in exchange for a service, favor, or product one would not normally provide because of the way it violated ones responsibilities to morals or ethics. If a member of congress would change his vote on an issue he feels strongly for $500,000, then $500,000 would be his whoring point.

"My dear, would you go to bed with me for a million pounds?"

"Well, yes, I guess I would."

"How about £5?"

"Of course not! What kind of person do you think I am!?"

"We've already established that. Now we're just haggling over the price."

attributed to Winston Churchill