👉 The term "fratricidal" is a slang phrase that refers to someone who kills their own sibling. This term originated in the early 20th century and has since become a popular term in various contexts, including literature, television, and media. In some cases, fraternizing with your own sibling can be considered fratricidal behavior if it involves violence or threats against another person's life. However, this is not necessarily an accurate description of the phrase itself, as "fr