Top Definition
When it's a person's birthday and they announce it every 5 minutes on Facebook for friends to wish them a happy birthday even though everyone already knows. Once their friends are suckered into sending birthday wishes - they then ask for more without saying thank you, leaving everyone amazed and moderately disgusted. Slight variation of attention whore
Birthday brat: HEY EVERYONE ITS MY BIRTHDAY TODAY WISH ME HAPPY BIRTHDAY

Thoughtful Friend: HAPPY BIRTHDAY

Birthday Brat replies: WHERE'S MY GIFT??????????????

Thoughtful friend messages everyone else secretly: OMG!! He has Birthday Psychosis!
by Blappy Pants September 09, 2011
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