Used in kpop when someone knows all the members of a kpop group and likes all the tittle tracks but they wouldn't classify themselves as "stans" of that particular group
Dating with out the pressure of a serious relationship. Often times a vauge reference to a loose relationship, although it doesn't have to be a sexual relationship. Casual dating can be a confusing term.
The sexual orientation of one who is completely straight but it quite comfortable talking about another member of the same sex in a midly sexual manner.
"'yeah, he's certainly got a nice firm butt'"
is casually straight, however
"'i would like to rag him one up the jacksie'"
is generally not considered casually straight and more quite simply gay.