When you fly to another country looking for a hookup only to find yourself hooking up with a person from the same country as you. Similar to paratrooping.
Man I was hoping to paratroop with some local tonight but turns out I'm gonna jetleg with this american at her hostel.
When you fly over long distances and your time gets all screwed up and you sleep at the wrong time.
Jimmy has jetleg, thats why he cant sleep well.