Term given to attractive young women who have very large tempers. These women usually are nymphos and have good intentions. They can become jealous at times and are over-protective of their feminine yet heterosexual boy-toys. They also like to make sandwiches with their boy-toys. They are fun and have a good sense of humor. Sometimes they have a hard time making up their minds, which may annoy you, yet you always find yourself running back to them. Brittni's are rare and precious.
"What's the deal with Frank's bitch?"
"I don't know man. She looks like she may be a brittni."