(noun)Any negative connotation having to do with emotions or actions of a girl on her period.
Boyfriend: Rachael keeps getting mad at everything I do... And everyone else she talks to. I try to love her with all my heart. What am I doing wrong?
His friend: Dude, maybe she's just skivvy
Boyfriend: Oh, you're probably right. I can see how her skivviness
can makethis way. Thanks, man. I'll just wait out the skiv