What is Mad Seamie?
1.
Mad Seamie is something you say when somebody does something completely mad or idiotic. You also use it sarcasticly when a person never does anything without thinking about it first.
If a person does a totally mad act you call him 'Mad Seamie' from then on.
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A straightedge middle-aged videogame addict who lives in the past, brags to others about instant messaging "hotties" and talki..