quickie
n. countable C1 Advanced US //ˈkwɪki// UK //kwˈɪki// quick·ie
n. a short, fast sexual encounter. It is a casual and slightly rude word for a quick meeting that is not planned in advance.
n. a brief, impromptu sexual encounter. Informal and often considered vulgar; frequently used in the context of casual or opportunistic relationships.
They had a quickie in the back seat of the car.
The couple decided on a quickie before heading to the airport to catch their flight.
From quick + -ie.