The Black Nib is part of a fountain pen and will be instantly recognisable by anyone born before 2000. This emoji is used to sign off messages or tweets.
The black nib emoji was introduced in 1995 and released as part of the Unicode 11.0 standard. This emoji can be found under the objects
category. Because the black nib emoji has been around for quite some time, it should display correctly in the majority of operating systems.