A paid companion that will, with the proper inducements i.e. material compensation, perform acts of sexual pleasure, or perversion depending on the agreed upon dollar amount. As a rule certain pay-platforms like Venmo are used for the transfer of funds, sometimes through a straw purchaser.
After the coke orgy, Joel Venmoed Megan $500 for "ass" after getting that exact amount from Matt exactly 30 minutes before. She is the consummate sexcort.
John: "Dude, I fucked Sally, but she said I had to keep it a sexcret."
Ted: "Had to keep it a what?"
John: "A sexcret, secret sex."
Ted: "Good job."
John: "Oh Fuck."