Breeches and Leather Uniform Fanclub.
An organisation formed in 1997 for men (predominantly, but not exclusively gay) who enjoy wearing breeches and/or leather uniforms, similar to the ones shown in the drawings of Tom of Finland.
BLUF organises regular parties
around the world, and provides a website where members can post profiles and
exchange messages with others.
The term is also used as a shorthand to describe a type of clothing, for example in
dresscodes or descriptions of items on auction sites.