Are australian girls usually trashy?

I'm not saying all australian girls are trashy, just the ones i've met are but when sum australians came to our school for 2 weeks, they kept flirting w/ my best friend. (that's a guy) They were all wearing mini skirts in the winter w/ a whole lot of makeup on their faces. They kept throwing themselves at him and this one girl said to him, " want me to show u how to save a person drowning?" and then touched his whole chest and "accidently" fell on him. I'm pisd cuz they thought i had a thing w/ him so they called me slet, wh0re, bich in front of me and givn me dirty looks and i have nvr talked to them b4. Are most australian girls like this??