When children who have recently acquired a younger sibling feel so excluded that they pretend the new member of the family simply doesn't exist.
Mary: "Who is that?" (motions to John's younger sibling)
John: "What are you talking about? I don't see anything."
Mary: "Oh John, I forgot you are still suffering from new sibling syndrome."
John: "What are you talking about? I don't see anything."
Mary: "Oh John, I forgot you are still suffering from new sibling syndrome."
by yepyepyepyepyepyepyep February 2, 2014
when you meet someone, who you get along with great, and you find out that you have the same names. a very rare coincidence.
usually between a guy and a girl who share names, (like sam, page, eric, jordan etc...)
usually between a guy and a girl who share names, (like sam, page, eric, jordan etc...)
person 1: man i've really been enjoying talking to you, but you still haven't told me your name.
person 2: ohh its sam.
person1: MINE TOO!!
person 2: you are totally my New Sibling!!!
person 2: ohh its sam.
person1: MINE TOO!!
person 2: you are totally my New Sibling!!!
by justin blue cheese December 19, 2008
