She is that masculine, tanned, deep voiced, short haired or curled up (similar to
granny hair) woman with body hair, who is just rude, bitter and aggressive to people.
She will be wearing jeans that reach her stomach and a buttoned shirt. Her formal clothes will be suits and ties. They are also usually tall and built, as opposed to the short and fat stereotype of a
dykey lesbian.
She is a bully to people smaller or weaker than her. Bulldykes are sometimes
school teachers - of gym and even kindergarten - they're like hell to children/students with their scary attitude and overall hard masculinity.
It is thought that they are brought to schools to scare children.