A Boston Cream Pie is the action you do while you creampie a woman. And what you do is insult her with a irish/Boston accent and then poor a small bag of coins on her.
"You like that you fookin gobshite?!?"
*poor's coins*
"You like that you fookin gobshite?!?"
*poor's coins*
by King_Maverick November 11, 2021