The Jolly Roger flag depiction is a popular symbol of piracy and includes a SKULL and crossbones. The term 'Jolly Roger' is derived from the French phrase jolie rouge, which translates to 'pretty red'. The SKULL and crossbones have been used as a warning sign since the 1700s and is often associated with danger and death. The crossword solution for this term is SKULL, which is an appropriate representation of the Jolly Roger flag.