I'll do the best I can with this:
A woman who is very horny more hours in a day than not. She will do ANYTHING necessary to fuck someone on whom she sets her sights during the day or evening. Anything it takes to have sex with them, she will do. She may be lesbian or hetero.
She awoke horny that morning, possibly after cumming in her sleep, likely with her fingers in a very wet pussy before her eyes were even open. If sleeping with a partner, it is unthinkable, even impossible, to start her day without a round of tempestuous sex, during which she will cum very hard, multiple times. She might take her shower without cumming again, but not always.
She will always, always fuck that night until she drops to sleep, either with a partner or herself. Is she's sleeping alone, it's only because she couldn't find anyone good enough for her that night.
The above definition does not apply to all sluts. It is to greater or lesser extents.