This is the 10917th most frequent German word.
sauerlach
"Sauerlach" is a proper noun; it refers to a municipality in Bavaria, Germany.
Here, 'Sauerlach' is a proper noun, referring to the name of a village.
Er zog in das schöne Dorf Sauerlach.
He moved to the beautiful village of Sauerlach.
In this sentence, 'sauer' means angry, and 'lachen' means to laugh; combined, they could imply an emotional shift.
Sie war sauer, als der Kuchen verbrannte, aber dann musste sie lachen.
She was angry when the cake burned, but then she had to laugh.
Here, 'saure Lache' is a pun where 'saure' (sour) and 'Lache' (puddle or laugh) creatively describe the tartness of a lemon as if it expresses itself with a character-like laugh.