1.A person who has little respect for others, loves sex, and will use their friends to get access to drugs or alcohol or penis and on occasion vagina.
2. A code word for "future alcoholic", most commonly used by adolescent teens.
3. Usually a blond female bimbo.
1. OMG Jessica, that girl is such a Brianna!
2. Stephanie: did you see that chick chug that beer!
Kayla: yeah! shes a Brianna alright.
3. Levi: Dood! my girlfriend is such a Brianna. All she wants is sex!
Robert: And the problem is...??