"killer heels" adj/n are a type of shoe that one could kill with -- physically, mentally and emotionally. they are described as heels that usually have at least a 4 inch stiletto (very thin heel, only recommended for experienced professionals) and are 'high fashion' (expen$ive). The shoe must be ridiculously sexy, stunning and an instant eye-catcher.
"I just bought some killer heels at Saks Fifth Avenue!"
"Five inch killer heels and heavy make up never fails to make me feel like a tranny!"
"I was wearing my killer heels today and stopped traffic. Killer!"