The pirate flag emoji is actually a combination of the black flag plus the skull and crossbones, which forms a jolly roger. These flags were popular with pirates who would hoist them on their ships as a sign of intimidation.
The pirate flag emoji was introduced in 2018 and released as part of the Unicode 11.0 standard. This emoji can be found under the flags
category. Because the pirate flag emoji has not been around for very long, it might not display correctly in some operating systems.