The awesome feeling you get after eating the best Subway sandwich in the history of sandwiches.
"That sexy Subway sandwich with Italian Herbs, Cheese bread, and Spicy Italian meat with jalapeños, vinegar, and oil gave me one hell of a subgasm last night!"
The intensely pleasurable feeling a doomsayer gets when saying "I told you so," often accompanied by a longrant pontificated with various enthusiastic gesticulations.
Doomsayer: Hahahahaha I told you the economy would crash!
Random Acquaintance: Woah, dude, don't have an I-told-you-sorgasm.