The Creamy Boatman is when a man performs a traditional style facial upon a male or female partner. Small coins are placed upon the eyes of the cum receiver to pay the boatman Charon to pass the river Dyx. Any smaller currency can be used.
"After doing some Hellenic studies I gave Helena a Creamy Boatman. There was money and semen involved."
To gain a large sum of money. This phrase is used by the guy from the, "Is this impostor from among us!?" meme. To hit a lick is to gain a large sum of money so hitting a boatlick is to hit a sizable lick that is larger than average. For example, the impostor on the phone in said video had said up a hit for a boatlick of approximately $100mil.