opzalmen

Etymology
Literally meaning "to salmon up", a reference to the habit of a salmon to swim upstream, used as a metaphor. A reference, and the opposite, to the in Flemish high school education, in which pupils start at a difficult, more abstract type of education (general education), then in case of failure, drop off to easier, more concrete types of education (technical or vocational education).

Verb

 * 1)  to move from an easier, more concrete type of high school education to a more difficult and abstract one