It's about Cartman during Christmas time. He might get into various misadventures and comical situations. Maybe he's trying to get presents or deal with family during the holiday.
Well, in Cartman's Christmas Story, it usually involves Cartman getting into all sorts of zany situations during Christmas. Maybe he's trying to get the best presents or dealing with his family in a comical way.
In 'cartman depressed fanfic', it can show a different side of Cartman. Usually, he is portrayed as a brash and often mean character. But when depressed, we can see his vulnerability. For instance, his usual bravado might disappear, and we can explore what lies beneath his tough exterior.
The 'Cartman Christmas Story' typically focuses on Cartman's perspective of Christmas. In South Park, Cartman is a very distinct character. His Christmas story could include his thoughts on Santa Claus, his reactions to Christmas traditions. For example, he might try to rewrite the rules of Christmas gift - giving or try to take over the local Christmas events. It also might show how his relationships with his mother and the other boys in the town are affected by the Christmas season.
The main character is Cartman, of course. Then there are his friends. Stan, who is often the voice of reason among them. Kyle, who might oppose Cartman's crazy ideas. Kenny, who has his own unique presence. Also, Cartman's mother, as she can influence Cartman's actions during Christmas. There may be some other side characters from South Park too, like the mayor or local shopkeepers who are part of the Christmas setting.
Since it's a fanfiction about Cartman's mom, it could be about various aspects of her life. It could be about her parenting style, how she copes with having a son like Cartman. It might also include her friendships or feuds with other moms in South Park. Or perhaps it's a comical or dramatic interpretation of a day in her life, but again, this is all speculation without reading the actual fanfiction.
I'm not entirely sure specifically about 'liane cartman's lemon fanfiction' as it could be very specific to a certain fandom or group. It might be a creative work by someone named Liane Cartman in the form of fanfiction. However, without more context, it's hard to determine its exact significance.