To stay cooped up at home at night (typically on the weekends) and to wallow in either homework, TV shows or takeout food instead of going out with mates and partying all night long.
Sally decided to stay in on Saturday instead of hanging out with her boyfriend because she needed to complete her assignment.
A term used by wankstas to send a message to today’s youth to stay in school. The reason for the misspelling of "B" and c "kool" is another way of saying stay in school or your going to grow up to be a lossa with no job no education and a couple illegitimate children and a call from the Maury Povich show asking you to take a maturity test to see if you are the father of a 5 and a half year old boy which clearly isn't yours because you don't have the same bone structure but it turns out that "YOU ARE....THE FATHER!" and the next thing you know you get smacked in the head with a metal chair from your one night stand while she screams "YOU ARE MY BABIES DADDY!" and you wonder where the Steve the bodyguard is but then you realize that he’s on the Jerry Springer show.
"yohomie i'm gonna drop outta skool." "No bro B kool stay in school."