This is the 1463rd most frequent Dutch word.
plas
"Puddle" or "small lake;" can also mean "pee" (informal).
Here, 'plas' refers to a small pool or puddle of liquid, often resulting from something being spilled or excreted.
De hond maakte een plas in de tuin.
The dog made a puddle in the garden.
In this context, 'plas' is used colloquially to refer to the act of urination.
Ik ga een plas doen voordat we vertrekken.
I am going to pee before we leave.
This use of 'plas' signifies a puddle created by accumulated liquid on a surface.