Someone who has sex for money.

High school kids tend to use terms they don't fully understand to criticise people in situations that they are too immature to grasp.

Right. The vocabulary and language comprehension of the average high school student probably isn't that complex. In other words, they don't understand (or don't care to understand) the difference in meaning between the words whore and slut. The latter of which is probably the word they were actually looking for.

someone who sleeps around A LOT, & then brags about it. i knew a girl like this a few yrs ago who was SHAMELESS! i know some people call it confidence, but this girl had absolutely NO dignity or self respect whatsoever. the next yr (after i had stopped hanging out w/ her) a friend of mine was telling me how she was living w/ a friend of hers & was w/a different guy almost every night & had even had sex out on a balcony where ppl could see them. she also wasn't using protection b/c she was on birth control. talk about std central!

A whore is a paid call girl. I got that in high school too and I was a virgin

whore n. A prostitute. A person considered sexually promiscuous. A person considered as having compromised principles for personal gain.
I was called this throughout high school as well even as a virgin. I was also called a whore the other night by my ex because I wouldn't give him information on what I was doing with my life since he left me. I have never had sex for money an never could.