Top Definition
A notebook that a person most often rites down every detail of all her sexual experences most often for 411 ing so she can make her boyfriend ect. also experence her sexual experences in his imagination.
For example she can look in it and think,"oh, I gave a blowjob that day and it was the firest time I swallowed cum.
She's got a sex diary.
by The Fury 13 October 23, 2010
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