This is the 134th most frequent Danish word.
søren
"Søren" is a Danish male given name; it is also used as a mild expletive, equivalent to "darn" or "heck."
Here, 'Søren' is used as a proper noun—the name of a person.
Søren går en tur i parken.
Søren takes a walk in the park.
In this case, 'Søren' is part of an idiomatic expression, used as an exclamation implying slight astonishment or emphasis.
For Søren da! Det var tæt på.
Oh, dear! That was close.
In this instance, 'Søren' is again used as a proper noun, addressing a person directly in a familiar or informal context.