1. Someone that has sex right before they take an exam.
2. When you get fingered and raped by a geisha.
When people are stressed for an exam, sometimes they tend to do strange stuff, like having sex to release stress, which is called a Teuntje.
Geisha's are Japanese, mysterious creatures.
Joseph has his exams tomorrow, he better go have a teuntje before he takes it.
Ahh help, I'm getting a Teuntje!!