Adjective. Describing someone (usually high school aged) who is always worring about what his/her parents think usually about activities of a high school relationship. (kissing, holding hands, general contact)
John: The other day i was at janes house
Josh: really how was it
John:we were in her room and she seriously stressin about how "Her parents are definetly gonna come in"
Josh: Sounds like she is parentnoid
John: Hell ya dude