1. Nickname for a 60+ year old hooker with saggy boobs.
2. The smell of burnt pubes.
3. A creature native to the scandinavian islands that is a major tourist attraction.
1. Person 1:See that hooker over there?
Person 2:Yeah shes an OSA!
2. Person 1:Awww what smells like osa?
Person 2:My burnt pubes, can you drive me to a hospital?
3. Person 1:Have you seen the Osa yet?