a loose term used by college students (usually via text) to either ask if they can come over to anothers apartment or dorm for a short amount of time to see whats up. or to convey an undefined amount of time as to when he/she will arrive.
Bill: whats good?
John: chilln at my place drinking some beers. U?
Bill: just finishing up some hwk.. care if i swing through?
John: thats str8