A group of fatsoccer girls, who usually do not realize they're fat. The origin of this acronym originated in Colonia, NJ where soccer girls are known notoriously for being fat. This term is constantly used in and around neighboring cities of Colonia but can we used nation wide, as long as the soccer girls in that town are overweight. FSG should not be mistaken for famous soccer girls or fabulous soccer girls.
Here comes the annoying FSG.
That fat girl Rebecca is part of that group fsg.