1 definition by Doctor Kenneth Noisewater

OCS

Only Child Syndrome - A person that has no brothers or sister. Has an extreme sense of possession. Always needs to feel like he or she is the best and most accomplished. Needs to be reassured of his or her superior standing constantly. They also use the two "M" words a lot "My", "Mine". This person will lash out and become defensive if they are called out on any of this "OCS Behavior".

John: "Can I use your pencil for a second."

OCS Person: "No it's mine."

by Doctor Kenneth Noisewater September 19, 2008