Whenever you get so fucked up you throw up on your dick while your taking a shit.
person 1: Dude you were so fucked up last night...
person 2: I know, I had a double headed dragon...
person 1: Omg are you okay?? Do you need some water?
A three-some where: person #1 is performing oral on person #2 while having sex with person number #3 , while the #3 is licking the rectum of person #2 simultaneously with #1 doing oral.
Person #2 talking to his brother: man, Sidney and Oliver played me like a double headed dragon last night!
Brother: oh yeah?!
Person #2: yeah man, my bed was a literal slip and slide and my knees didn't work for hours after!
A phenomenon in film/television series, most notably streaming series, where the main premise is drawn out to such a point that it takes an entire season or more to get the parts of the series the audience is actually interested in seeing.
For example, if a series is titled "Surf Dracula," a majority of viewers would tune in expecting to see Dracula surfing by the first or second episode. However, the entire first season would instead be tedious padding and backstory before finally ending with Dracula surfing in the last five minutes of the season finale.
I watched "Smallville" on Netflix the other day. Dude, it was ten seasons of filler before he finally flew! Major Surf Dracula Syndrome!