What does the online joke "Goddess wrote a fat word" mean?

"Fat" can be disassembled as: about it, homophonic: about it.

It means: let's date.

Connotation analysis:

Shen: It's sunny before and after.

From: enter later

Hmm: Two in both directions.

Shen: I wear it during the day.

Author: ultimately

Hmm: Two in both directions.