1. When a hooker who usually is very expensive lets you fuck her for free.
2. When you use Cool Whip during oral sex
3. The most common pie that clowns throw at each other
Jake: Dude, I just had some million dollar pie with Amber last night!
Tim: Lucky! That chick practically stole my wallet last week.
Lisa: I thought you were usually grossed out by oral sex.
Janet: I am, but we had million dollar pie last night so it was kinda delicious.