When a girl gets blue nails it typically means she has a significant other or/ aka, a boyfriend. Females use this color to let other people know she is no longer available.

Internet persona(s) who happens to follow you and you happen to follow them back and maintain communication with and have a mutual liking for eachother whether it be friendship wise, etc. (Mutuals if more than one mutual)

Slang for female customer service person who is usually more concerned with their fingernail polish then your customer satisfaction. Usually unsatisfied with their "career" so it comes out in their lack of care/energy for the work their supposed to be doing.