usually a tiny little woman with extremely large breasts. most times they have a specific body type that is perfect so they do not need to work out...ever. and always has secret love affairs with foreign named men.
Damn, I neversee her at the gym, shes such a sisley!
1. Technical term used to describe an especially attractive alpha of the species. Commonly used in chat rooms.
2. Colloquial for a statement that makes one appear as an attractive alpha of the species. Frequently, it is used as a double-meaning replacement for another common word in the sentence.