A nickname for a girl who spends more nights at her boyfriend's place than her own and as a result becomes distant and sometimes hard to reach. Users of the word are usually jealous of the person being nicknamed. It is imperative to note that a Slutsky is not by any means a slut.
...Carrie is returning to her dorm room at 10 in the morning just before class...
Madison - "Hey Slutsky, what's up?"
Carrie - "Not too much, I just got back from my boyfriend's, but I'm running late for class, can we talk later?"
Madison - "Sure, if I ever get to see you later..."