op een oude fiets moet je het leren *
* you have to learn it on an old bicycle
Expression used just about never by Some People
Used to refer to a young person going out with an older partner (often younger men with older women). It can also be used for people using other learning tools that are quite old (like old books, etc.)
"Heb je de nieuwe vriendin van Jos gezien?" "Tsja, op een oude fiets moet je het leren."
"Have you seen Jos's new girlfriend?" "Well, you have to learn it on an old bicycle."
3 out of 4 Dutch, Flemish speakers have heard this