A whore. A person who wants to have sex ALL the time. Could be a sex addict or could just be a slut. Someone who needs help.
Brandon: Heyy Katherine !
Katherine: Hey brandon...wanna have sex with me ?
Brandon: Nahh we just did it an hour ago !
Katherine: Oh alright...i'll just ask James .
Brandon to James: Damn !! She's such a plusker !!