Another word for a prostitute. Someone who performs sexual acts for money. It also refers to a person who wastes their abilities by working for unworthy, disgraceful causes.
Usually refers to a woman, but can refer to a man.
It's not exactly legitimate to call somebody a whore unless they are paid for what they do.
"Before he met you, he was such a whore-! No, sorry-! Whores get paid. He was a slut!"