Crashy (adj) a description reserved for ridiculously glamorous and sexy ladies. The act of being "crashy" is a delicate balance of classy and trashy. When expertly executed, a lady's appearance would seem to say "My standards are high just like my heels, and I have self-respect" and "I am going to rock you all night long". Glitter is highly recommended.
Friend- "WOW! You look like Audrey Hepburn met Snooki! How'd you pull it off??"
You- "Why thank you! I wanted to look young and still have fun tonight, but not look totally like a baby prostitute :) "
Friend- "Neat-o! Very crashy!"