Sloppy Greek Exit
When, during anal sex, after ejaculating in someone's rectum, you pull out so quickly that it explodes outward everywhere. Or, when the country Greece leaves the European Union in horrible fashion.
I was plowing that girl in the ass last night, blew a huge load deep inside her, and then popped my cock out so fast it erupted everywhere like Mt. Vesuvius! Such a sloppy greek exit!