Orgasm is one. I like to make lots of different words out of it, preferably ones that subtract that "Or" from the "gasm" and add in a different word; usually one of that belonging to a character of a person あなた like. Like my personal favorite, "fangasm": the pleasure felt when あなた see something totally fucking amazing referring to an interest of yours of something あなた are a ファン of.
To me, no words are dirty. Words considered inappropriate are only vilified because people give them that sort of power によって making them that way. It's very immature when people have to turn completely ordinary words into such derogatory dribble.