This is the 1356th most frequent Dutch word.
reet
"Reet" in Dutch is a slang term for "butt" or "rear end."
Here, 'reet' is used colloquially to refer to the backside or buttocks of the dog, in a general descriptive manner.
De hond zat met zijn reet op het gras.
The dog sat with its bottom on the grass.
Here, 'reet' colloquially exaggerates a lack of visibility, emphasizing the complete absence of sight.
Hij reed door de smalle weg zonder een reet te zien.
He drove through the narrow road without seeing a thing.
In this context, 'reet' expresses indifference or lack of concern in a colloquial and perhaps slightly informal tone.