Top Definition
A person who is overly excited or cheerful, especially about something lame.
All right. I get it - you like American Idol. Quit being such a Happy Smack about it.
by Willie K May 28, 2008
10 Words related to Happy Smack
Heroin that is believed to increase happiness.
I'm gonna buy some Happysmack and feel good all day.
by FenixIgnition August 18, 2011

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