This is the 1197th most frequent Dutch word.
dijk
A "dijk" is a "dyke" or "embankment" used to prevent flooding.
Here, 'dijk' is used in its literal sense, referring to a structure built to prevent flooding.
De dijk beschermt het dorp tegen overstromingen.
The dike protects the village from floods.
In this idiomatic expression, 'dijk' is used metaphorically to emphasize excellence.
Hij is echt een dijk van een voetballer.
He is truly a top-notch football player.
Again, 'dijk' is used in its primary meaning, a path along a water barrier, often a location for recreation.