"@" Replacing "A", "at", or "O"
Since at least 1980, people have used the "at sign" ("@") as a representation of the circled letter A. This has been extended to substituting it for the letter "A" as in the crass fanzine "Toxic Gr@fity"
It is often used to combine feminine and masculine words in Spanish, such as Latin@ to mean Latino/Latina
Read more about this topic: Satiric Misspelling