1. to parade one's vehicle on city streets with or without a destination, sometimes accompanied with excessively loud music, headrest-mounted LCD monitors, or both.
2. a term used to explain a current state of unproductivity. Predominately used by caucasian males from the Northern Los Angeles County (i.e. Palmdale, Acton). Also see chillin.
Cruisin for sex. (Cruising).
Basically, you're in a public spot or on the Internet looking for someone to fuck. Almost every town has cruise spots where horny people chill waiting to bang. No strings attached, no names exchanged, just pure lust.
I was cruisin at the state park and found this hot ass bitch, and we got it on.