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2.
A person who has a myspace and facebook profile.
My aunt is a space booker, she's always online.
by toeknee martian June 14, 2010
 
1.
someone who consistantly looks at their facebook and myspace all day for entertainment purposes.
What has John been doing this summer?
I'm pretty sure he's a spacebooker and doesn't do much.
by Lou-Money July 31, 2008