A Beri Eri is a girl that has a penis longer than the average. A Beri Eri gets sexually aroused by performing intimate activities with bird-like creatures, an example of a bird-like creature could be a duck.
person 1: you are into some weird shit, mate.
Person 2: no I am not
Person 1: you are a Beri Eri.
Son: mother I like girls, but only a Beri Eri.
mother: that is fine I support you
it is a saying that revolves around teachers, more specifically it is about when a teacher takes away the joy, you once had for a subject.
person 1: "Hey man, let's go to the English lesson"
person 2: "Damn I really don't want to"
person 1: " But didn't you say you loved the teacher, and the subject like a year ago"
person 2: " I know but she (the teacher) has turned into a Bossbente"
person 1: " What does that mean?"
person 2: " it is when a teacher just take the joy away of the subject"
person 1: "Oh I see, and yeah she is kinda Bossbente"